diff --git a/README.md b/README.md
index 1233f475..b0820ded 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ If you have Issues, refer to [Known Issues](https://christitustech.github.io/win
 
 These are the sponsors that help keep this project alive with monthly contributions.
 
-<!-- sponsors --><a href="https://github.com/ysaito8015"><img src="https://github.com/ysaito8015.png" width="60px" alt="Yusuke Saito" /></a><a href="https://github.com/TriHydera"><img src="https://github.com/TriHydera.png" width="60px" alt="TriHydera" /></a><a href="https://github.com/jozozovko"><img src="https://github.com/jozozovko.png" width="60px" alt="" /></a><a href="https://github.com/DelDongo"><img src="https://github.com/DelDongo.png" width="60px" alt="" /></a><a href="https://github.com/markamos"><img src="https://github.com/markamos.png" width="60px" alt="Mark Amos" /></a><a href="https://github.com/dwelfusius"><img src="https://github.com/dwelfusius.png" width="60px" alt="" /></a><a href="https://github.com/mews-se"><img src="https://github.com/mews-se.png" width="60px" alt="" /></a><a href="https://github.com/jdiegmueller"><img src="https://github.com/jdiegmueller.png" width="60px" alt="Jason A. Diegmueller" /></a><a href="https://github.com/AlanTristar"><img src="https://github.com/AlanTristar.png" width="60px" alt="" /></a><a href="https://github.com/JennJones89"><img src="https://github.com/JennJones89.png" width="60px" alt="" /></a><a href="https://github.com/zepled112"><img src="https://github.com/zepled112.png" width="60px" alt="wyatt" /></a><a href="https://github.com/altugtekiner"><img src="https://github.com/altugtekiner.png" width="60px" alt="" /></a><a href="https://github.com/robertsandrock"><img src="https://github.com/robertsandrock.png" width="60px" alt="" /></a><a href="https://github.com/mmomega"><img src="https://github.com/mmomega.png" width="60px" alt="" /></a><a href="https://github.com/KenichiQaz"><img src="https://github.com/KenichiQaz.png" width="60px" alt="Stefan" /></a><a href="https://github.com/thaddl"><img src="https://github.com/thaddl.png" width="60px" alt="thaddl" /></a><a href="https://github.com/paulsheets"><img src="https://github.com/paulsheets.png" width="60px" alt="Paul" /></a><a href="https://github.com/djones369"><img src="https://github.com/djones369.png" width="60px" alt="Dave Jones" /></a><a href="https://github.com/anthonymendez"><img src="https://github.com/anthonymendez.png" width="60px" alt="Anthony Mendez" /></a><a href="https://github.com/woobe-studio"><img src="https://github.com/woobe-studio.png" width="60px" alt="Michael Wozniak" /></a><a href="https://github.com/xBandaku"><img src="https://github.com/xBandaku.png" width="60px" alt="xPandaku" /></a><a href="https://github.com/claudemods"><img src="https://github.com/claudemods.png" width="60px" alt="Claudemods" /></a><a href="https://github.com/hkolatan"><img src="https://github.com/hkolatan.png" width="60px" alt="Halil Kolatan" /></a><!-- sponsors -->
+<!-- sponsors --><a href="https://github.com/ysaito8015"><img src="https://github.com/ysaito8015.png" width="60px" alt="Yusuke Saito" /></a><a href="https://github.com/TriHydera"><img src="https://github.com/TriHydera.png" width="60px" alt="TriHydera" /></a><a href="https://github.com/jozozovko"><img src="https://github.com/jozozovko.png" width="60px" alt="" /></a><a href="https://github.com/DelDongo"><img src="https://github.com/DelDongo.png" width="60px" alt="" /></a><a href="https://github.com/markamos"><img src="https://github.com/markamos.png" width="60px" alt="Mark Amos" /></a><a href="https://github.com/dwelfusius"><img src="https://github.com/dwelfusius.png" width="60px" alt="" /></a><a href="https://github.com/mews-se"><img src="https://github.com/mews-se.png" width="60px" alt="" /></a><a href="https://github.com/jdiegmueller"><img src="https://github.com/jdiegmueller.png" width="60px" alt="Jason A. Diegmueller" /></a><a href="https://github.com/AlanTristar"><img src="https://github.com/AlanTristar.png" width="60px" alt="" /></a><a href="https://github.com/JennJones89"><img src="https://github.com/JennJones89.png" width="60px" alt="" /></a><a href="https://github.com/zepled112"><img src="https://github.com/zepled112.png" width="60px" alt="wyatt" /></a><a href="https://github.com/altugtekiner"><img src="https://github.com/altugtekiner.png" width="60px" alt="" /></a><a href="https://github.com/robertsandrock"><img src="https://github.com/robertsandrock.png" width="60px" alt="" /></a><a href="https://github.com/mmomega"><img src="https://github.com/mmomega.png" width="60px" alt="" /></a><a href="https://github.com/KenichiQaz"><img src="https://github.com/KenichiQaz.png" width="60px" alt="Stefan" /></a><a href="https://github.com/thaddl"><img src="https://github.com/thaddl.png" width="60px" alt="thaddl" /></a><a href="https://github.com/paulsheets"><img src="https://github.com/paulsheets.png" width="60px" alt="Paul" /></a><a href="https://github.com/djones369"><img src="https://github.com/djones369.png" width="60px" alt="Dave Jones" /></a><a href="https://github.com/anthonymendez"><img src="https://github.com/anthonymendez.png" width="60px" alt="Anthony Mendez" /></a><a href="https://github.com/woobe-studio"><img src="https://github.com/woobe-studio.png" width="60px" alt="Michael Wozniak" /></a><a href="https://github.com/xBandaku"><img src="https://github.com/xBandaku.png" width="60px" alt="xPandaku" /></a><a href="https://github.com/claudemods"><img src="https://github.com/claudemods.png" width="60px" alt="Claudemods" /></a><a href="https://github.com/hkolatan"><img src="https://github.com/hkolatan.png" width="60px" alt="Halil Kolatan" /></a><a href="https://github.com/FatBastard0"><img src="https://github.com/FatBastard0.png" width="60px" alt="" /></a><a href="https://github.com/tcookj66"><img src="https://github.com/tcookj66.png" width="60px" alt="Timothy Cook" /></a><!-- sponsors -->
 
 ## 🏅 Thanks to all Contributors
 Thanks a lot for spending your time helping Winutil grow. Thanks a lot! Keep rocking 🍻.
diff --git a/config/themes.json b/config/themes.json
index 2c11a09d..90615e8f 100644
--- a/config/themes.json
+++ b/config/themes.json
@@ -1,220 +1,169 @@
 {
-    "Classic":  {
-                    "CustomDialogFontSize":       "12",
-                    "CustomDialogFontSizeHeader": "14",
-                    "CustomDialogIconSize":       "25",
-                    "CustomDialogWidth":          "400",
-                    "CustomDialogHeight":         "200",
+    "_default": {
+        "CustomDialogFontSize":       "12",
+        "CustomDialogFontSizeHeader": "14",
+        "CustomDialogIconSize":       "25",
+        "CustomDialogWidth":          "400",
+        "CustomDialogHeight":         "200",
 
-                    "FontSize":         "12",
-                    "FontFamily":       "Arial",
-                    "FontSizeHeading":  "14",
-                    "HeaderFontFamily": "Consolas, Monaco",
+        "FontSize":         "14",
+        "FontFamily":       "Arial",
+        "FontSizeHeading":  "16",
+        "HeaderFontFamily": "Consolas, Monaco",
 
-                    "CheckBoxBulletDecoratorFontSize": "14",
-                    "CheckBoxMargin": "15,0,0,2",
+        "CheckBoxBulletDecoratorSize": "14",
+        "CheckBoxMargin": "15,0,0,2",
 
-                    "TabButtonFontSize":      "14",
-                    "TabButtonWidth":         "100",
-                    "TabButtonHeight":        "25",
-                    "TabRowHeightInPixels":   "50",
-                    "IconFontSize":     "14",
-                    "IconButtonSize":   "35",
-                    "WinUtilIconSize":        "Auto",
-                    "SettingsIconFontSize":   "18",
+        "TabContentMargin":       "5",
+        "TabButtonFontSize":      "14",
+        "TabButtonWidth":         "100",
+        "TabButtonHeight":        "25",
+        "TabRowHeightInPixels":   "50",
+        "IconFontSize":     "14",
+        "IconButtonSize":   "35",
+        "WinUtilIconSize":        "Auto",
+        "SettingsIconFontSize":   "18",
+        "CloseIconFontSize":      "18",
 
-                    "MicroWinLogoSize": "10",
+        "MicroWinLogoSize": "10",
 
-                    "ProgressBarForegroundColor": "#FFAC1C",
-                    "ProgressBarBackgroundColor": "Transparent",
-                    "ProgressBarTextColor": "#000000",
+        "ProgressBarForegroundColor": "#FFAC1C",
+        "ProgressBarBackgroundColor": "Transparent",
+        "ProgressBarTextColor": "#000000",
 
-                    "ComboBoxBackgroundColor":  "#FFFFFF",
-                    "LabelboxForegroundColor":  "#000000",
-                    "MainForegroundColor":  "#000000",
-                    "MainBackgroundColor":  "#FFFFFF",
-                    "LabelBackgroundColor":  "#FAFAFA",
-                    "LinkForegroundColor":  "#000000",
-                    "LinkHoverForegroundColor":  "#000000",
-                    "GroupBorderBackgroundColor":  "#000000",
-                    "ComboBoxForegroundColor":  "#000000",
+        "ComboBoxBackgroundColor":  "#FFFFFF",
+        "LabelboxForegroundColor":  "#000000",
+        "MainForegroundColor":  "#000000",
+        "MainBackgroundColor":  "#FFFFFF",
+        "LabelBackgroundColor":  "#FAFAFA",
+        "LinkForegroundColor":  "#000000",
+        "LinkHoverForegroundColor":  "#000000",
+        "GroupBorderBackgroundColor":  "#000000",
+        "ComboBoxForegroundColor":  "#000000",
 
-                    "ButtonFontSize":   "12",
-                    "ButtonFontFamily": "Arial",
-                    "ButtonWidth":      "200",
-                    "ButtonHeight":     "25",
-                    "ConfigTabButtonFontSize":      "16",
+        "ButtonFontSize":   "12",
+        "ButtonFontFamily": "Arial",
+        "ButtonWidth":      "200",
+        "ButtonHeight":     "25",
+        "ConfigTabButtonFontSize":      "16",
 
-                    "SearchBarWidth":               "200",
-                    "SearchBarHeight":              "25",
-                    "SearchBarTextBoxFontSize":     "16",
-                    "SearchBarClearButtonFontSize": "14",
+        "SearchBarWidth":               "200",
+        "SearchBarHeight":              "25",
+        "SearchBarTextBoxFontSize":     "12",
+        "SearchBarClearButtonFontSize": "14",
 
-                    "ButtonInstallBackgroundColor":  "#FFFFFF",
-                    "ButtonTweaksBackgroundColor":  "#FFFFFF",
-                    "ButtonConfigBackgroundColor":  "#FFFFFF",
-                    "ButtonUpdatesBackgroundColor":  "#FFFFFF",
-                    "ButtonInstallForegroundColor":  "#000000",
-                    "ButtonTweaksForegroundColor":  "#000000",
-                    "ButtonConfigForegroundColor":  "#000000",
-                    "ButtonUpdatesForegroundColor":  "#000000",
-                    "ButtonBackgroundColor":  "#F5F5F5",
-                    "ButtonBackgroundPressedColor":  "#1A1A1A",
-                    "CheckboxMouseOverColor": "#999999",
-                    "ButtonBackgroundMouseoverColor":  "#C2C2C2",
-                    "ButtonBackgroundSelectedColor":  "#F0F0F0",
-                    "ButtonForegroundColor":  "#000000",
-                    "ToggleButtonOnColor":  "#2e77ff",
+        "ButtonInstallBackgroundColor":  "#FFFFFF",
+        "ButtonTweaksBackgroundColor":  "#FFFFFF",
+        "ButtonConfigBackgroundColor":  "#FFFFFF",
+        "ButtonUpdatesBackgroundColor":  "#FFFFFF",
+        "ButtonInstallForegroundColor":  "#000000",
+        "ButtonTweaksForegroundColor":  "#000000",
+        "ButtonConfigForegroundColor":  "#000000",
+        "ButtonUpdatesForegroundColor":  "#000000",
+        "ButtonBackgroundColor":  "#F5F5F5",
+        "ButtonBackgroundPressedColor":  "#1A1A1A",
+        "CheckboxMouseOverColor": "#999999",
+        "ButtonBackgroundMouseoverColor":  "#C2C2C2",
+        "ButtonBackgroundSelectedColor":  "#F0F0F0",
+        "ButtonForegroundColor":  "#000000",
+        "ToggleButtonOnColor":  "#2e77ff",
 
-                    "ButtonBorderThickness":  "1",
-                    "ButtonMargin":  "1",
-                    "ButtonCornerRadius": "2",
-                    "BorderColor": "#000000",
-                    "BorderOpacity": "0.2",
-                    "ShadowPulse": "Forever"
-                },
-    "Matrix":  {
-                    "CustomDialogFontSize":       "12",
-                    "CustomDialogFontSizeHeader": "14",
-                    "CustomDialogIconSize":       "25",
-                    "CustomDialogWidth":          "400",
-                    "CustomDialogHeight":         "200",
+        "ButtonBorderThickness":  "1",
+        "ButtonMargin":  "1",
+        "ButtonCornerRadius": "2",
+        "BorderColor": "#000000",
+        "BorderOpacity": "0.2",
+        "ShadowPulse": "Forever"
+    },
+    "Classic": {
+        "ComboBoxBackgroundColor":  "#FFFFFF",
+        "LabelboxForegroundColor":  "#000000",
+        "MainForegroundColor":  "#000000",
+        "MainBackgroundColor":  "#FFFFFF",
+        "LabelBackgroundColor":  "#FAFAFA",
+        "LinkForegroundColor":  "#000000",
+        "LinkHoverForegroundColor":  "#000000",
+        "GroupBorderBackgroundColor":  "#000000",
+        "ComboBoxForegroundColor":  "#000000",
 
-                    "FontSize":         "12",
-                    "FontFamily":       "Arial",
-                    "FontSizeHeading":  "14",
-                    "HeaderFontFamily": "Consolas, Monaco",
+        "ButtonInstallBackgroundColor":  "#FFFFFF",
+        "ButtonTweaksBackgroundColor":  "#FFFFFF",
+        "ButtonConfigBackgroundColor":  "#FFFFFF",
+        "ButtonUpdatesBackgroundColor":  "#FFFFFF",
+        "ButtonInstallForegroundColor":  "#000000",
+        "ButtonTweaksForegroundColor":  "#000000",
+        "ButtonConfigForegroundColor":  "#000000",
+        "ButtonUpdatesForegroundColor":  "#000000",
+        "ButtonBackgroundColor":  "#F5F5F5",
+        "ButtonBackgroundPressedColor":  "#1A1A1A",
+        "CheckboxMouseOverColor": "#999999",
+        "ButtonBackgroundMouseoverColor":  "#C2C2C2",
+        "ButtonBackgroundSelectedColor":  "#F0F0F0",
+        "ButtonForegroundColor":  "#000000",
+        "ToggleButtonOnColor":  "#2e77ff"
+    },
+    "Matrix": {
+        "ComboBoxBackgroundColor":  "#000000",
+        "LabelboxForegroundColor":  "#FFEE58",
+        "MainForegroundColor":  "#9CCC65",
+        "MainBackgroundColor":  "#000000",
+        "LabelBackgroundColor":  "#000000",
+        "LinkForegroundColor":  "#add8e6",
+        "LinkHoverForegroundColor":  "#FFFFFF",
+        "ComboBoxForegroundColor":  "#FFEE58",
 
-                    "CheckBoxBulletDecoratorFontSize": "14",
-                    "CheckBoxMargin": "15,0,0,2",
+        "ProgressBarForegroundColor": "#222222",
+        "ProgressBarBackgroundColor": "Transparent",
+        "ProgressBarTextColor": "#cccccc",
 
-                    "TabButtonFontSize":      "14",
-                    "TabButtonWidth":         "100",
-                    "TabButtonHeight":        "25",
-                    "TabRowHeightInPixels":   "50",
-                    "IconFontSize":     "14",
-                    "IconButtonSize":   "35",
-                    "WinUtilIconSize":        "Auto",
-                    "SettingsIconFontSize":   "18",
+        "ButtonInstallBackgroundColor":  "#222222",
+        "ButtonTweaksBackgroundColor":  "#333333",
+        "ButtonConfigBackgroundColor":  "#444444",
+        "ButtonUpdatesBackgroundColor":  "#555555",
+        "ButtonInstallForegroundColor":  "#FFFFFF",
+        "ButtonTweaksForegroundColor":  "#FFFFFF",
+        "ButtonConfigForegroundColor":  "#FFFFFF",
+        "ButtonUpdatesForegroundColor":  "#FFFFFF",
+        "ButtonBackgroundColor":  "#000019",
+        "ButtonBackgroundPressedColor":  "#FFFFFF",
+        "ButtonBackgroundMouseoverColor":  "#A55A64",
+        "ButtonBackgroundSelectedColor":  "#FF5733",
+        "ButtonForegroundColor":  "#9CCC65",
+        "ToggleButtonOnColor":  "#2e77ff",
 
-                    "MicroWinLogoSize": "10",
+        "BorderColor": "#FFAC1C",
+        "BorderOpacity": "0.8",
+        "ShadowPulse": "0:0:3"
+    },
+    "Dark": {
+        "ComboBoxBackgroundColor":  "#000000",
+        "LabelboxForegroundColor":  "#FFEE58",
+        "MainForegroundColor":  "#9CCC65",
+        "MainBackgroundColor":  "#000000",
+        "LabelBackgroundColor":  "#000000",
+        "LinkForegroundColor":  "#add8e6",
+        "LinkHoverForegroundColor":  "#FFFFFF",
+        "ComboBoxForegroundColor":  "#FFEE58",
 
-                    "ProgressBarForegroundColor": "#222222",
-                    "ProgressBarBackgroundColor": "Transparent",
-                    "ProgressBarTextColor": "#cccccc",
+        "ProgressBarForegroundColor": "#222222",
+        "ProgressBarBackgroundColor": "Transparent",
+        "ProgressBarTextColor": "#cccccc",
 
-                    "ComboBoxBackgroundColor":  "#000000",
-                    "LabelboxForegroundColor":  "#FFEE58",
-                    "MainForegroundColor":  "#9CCC65",
-                    "MainBackgroundColor":  "#000000",
-                    "LabelBackgroundColor":  "#000000",
-                    "LinkForegroundColor":  "#add8e6",
-                    "LinkHoverForegroundColor":  "#FFFFFF",
-                    "ComboBoxForegroundColor":  "#FFEE58",
+        "ButtonInstallBackgroundColor": "#222222",
+        "ButtonTweaksBackgroundColor":  "#333333",
+        "ButtonConfigBackgroundColor":  "#444444",
+        "ButtonUpdatesBackgroundColor": "#555555",
+        "ButtonInstallForegroundColor": "#FFFFFF",
+        "ButtonTweaksForegroundColor":  "#FFFFFF",
+        "ButtonConfigForegroundColor":  "#FFFFFF",
+        "ButtonUpdatesForegroundColor": "#FFFFFF",
+        "ButtonBackgroundColor":  "#000019",
+        "ButtonBackgroundPressedColor":   "#9CCC65",
+        "ButtonBackgroundMouseoverColor": "#FF5733",
+        "ButtonBackgroundSelectedColor":  "#FF5733",
+        "ButtonForegroundColor":  "#9CCC65",
+        "ToggleButtonOnColor":    "#2e77ff",
 
-                    "ButtonFontSize":   "12",
-                    "ButtonFontFamily": "Arial",
-                    "ButtonWidth":      "200",
-                    "ButtonHeight":     "25",
-                    "ConfigTabButtonFontSize":      "16",
-
-                    "SearchBarWidth":               "200",
-                    "SearchBarHeight":              "25",
-                    "SearchBarTextBoxFontSize":     "16",
-                    "SearchBarClearButtonFontSize": "14",
-
-                    "ButtonInstallBackgroundColor":  "#222222",
-                    "ButtonTweaksBackgroundColor":  "#333333",
-                    "ButtonConfigBackgroundColor":  "#444444",
-                    "ButtonUpdatesBackgroundColor":  "#555555",
-                    "ButtonInstallForegroundColor":  "#FFFFFF",
-                    "ButtonTweaksForegroundColor":  "#FFFFFF",
-                    "ButtonConfigForegroundColor":  "#FFFFFF",
-                    "ButtonUpdatesForegroundColor":  "#FFFFFF",
-                    "ButtonBackgroundColor":  "#000019",
-                    "ButtonBackgroundPressedColor":  "#FFFFFF",
-                    "ButtonBackgroundMouseoverColor":  "#A55A64",
-                    "ButtonBackgroundSelectedColor":  "#FF5733",
-                    "ButtonForegroundColor":  "#9CCC65",
-                    "ToggleButtonOnColor":  "#2e77ff",
-
-                    "ButtonBorderThickness":  "1",
-                    "ButtonMargin":  "1",
-                    "ButtonCornerRadius": "2",
-                    "BorderColor": "#FFAC1C",
-                    "BorderOpacity": "0.8",
-                    "ShadowPulse": "0:0:3"
-               },
-     "Dark":  {
-                    "CustomDialogFontSize":       "12",
-                    "CustomDialogFontSizeHeader": "14",
-                    "CustomDialogIconSize":       "25",
-                    "CustomDialogWidth":          "400",
-                    "CustomDialogHeight":         "200",
-
-                    "FontSize":         "12",
-                    "FontFamily":       "Arial",
-                    "FontSizeHeading":  "14",
-                    "HeaderFontFamily": "Consolas, Monaco",
-
-                    "CheckBoxBulletDecoratorFontSize": "14",
-                    "CheckBoxMargin": "15,0,0,2",
-
-                    "TabButtonFontSize":      "14",
-                    "TabButtonWidth":         "100",
-                    "TabButtonHeight":        "25",
-                    "TabRowHeightInPixels":   "50",
-                    "IconFontSize":     "14",
-                    "IconButtonSize":   "35",
-                    "WinUtilIconSize":        "Auto",
-                    "SettingsIconFontSize":   "18",
-
-                    "MicroWinLogoSize": "10",
-
-                    "ProgressBarForegroundColor": "#222222",
-                    "ProgressBarBackgroundColor": "Transparent",
-                    "ProgressBarTextColor": "#FFFFFF",
-
-                    "ComboBoxBackgroundColor":  "#000000",
-                    "LabelboxForegroundColor":  "#FFEE58",
-                    "MainForegroundColor":  "#9CCC65",
-                    "MainBackgroundColor":  "#000000",
-                    "LabelBackgroundColor":  "#000000",
-                    "LinkForegroundColor":  "#add8e6",
-                    "LinkHoverForegroundColor":  "#FFFFFF",
-                    "ComboBoxForegroundColor":  "#FFEE58",
-
-                    "ButtonFontSize":   "12",
-                    "ButtonFontFamily": "Arial",
-                    "ButtonWidth":      "200",
-                    "ButtonHeight":     "25",
-                    "ConfigTabButtonFontSize":      "16",
-
-                    "SearchBarWidth":               "200",
-                    "SearchBarHeight":              "25",
-                    "SearchBarTextBoxFontSize":     "16",
-                    "SearchBarClearButtonFontSize": "14",
-
-                    "ButtonInstallBackgroundColor": "#222222",
-                    "ButtonTweaksBackgroundColor":  "#333333",
-                    "ButtonConfigBackgroundColor":  "#444444",
-                    "ButtonUpdatesBackgroundColor": "#555555",
-                    "ButtonInstallForegroundColor": "#FFFFFF",
-                    "ButtonTweaksForegroundColor":  "#FFFFFF",
-                    "ButtonConfigForegroundColor":  "#FFFFFF",
-                    "ButtonUpdatesForegroundColor": "#FFFFFF",
-                    "ButtonBackgroundColor":  "#000019",
-                    "ButtonBackgroundPressedColor":   "#9CCC65",
-                    "ButtonBackgroundMouseoverColor": "#FF5733",
-                    "ButtonBackgroundSelectedColor":  "#FF5733",
-                    "ButtonForegroundColor":  "#9CCC65",
-                    "ToggleButtonOnColor":    "#2e77ff",
-
-                    "ButtonBorderThickness":  "1",
-                    "ButtonMargin":  "1",
-                    "ButtonCornerRadius": "2",
-                    "BorderColor": "#FFAC1C",
-                    "BorderOpacity": "0.2",
-                    "ShadowPulse": "Forever"
-               }
+        "BorderColor": "#FFAC1C"
+    }
 }
diff --git a/functions/private/Set-WinUtilUITheme.ps1 b/functions/private/Set-WinUtilUITheme.ps1
new file mode 100644
index 00000000..c71ae88c
--- /dev/null
+++ b/functions/private/Set-WinUtilUITheme.ps1
@@ -0,0 +1,83 @@
+function Set-WinUtilUITheme {
+    <#
+        .SYNOPSIS
+            Sets the theme of the XAML file
+
+        .PARAMETER inputXML
+            A string representing the XAML object to modify
+
+        .PARAMETER customThemeName
+            The name of the custom theme to set the XAML to. Defaults to 'matrix'
+
+        .PARAMETER defaultThemeName
+            The name of the default theme to use when setting the XAML. Defaults to '_default'
+
+        .EXAMPLE
+            $returnVal = Set-WinUtilUITheme -inputXAML $inputXAML
+            if ($returnVal[0] -eq "") {
+                Write-Host "Failed to process inputXML"
+            } else {
+                $inputXML = $returnVal[0]
+            }
+            # to know which theme this function has used, access the second item in returned value.
+            Write-Host "Theme used in processing: $($returnVal[1])"
+    #>
+
+    param (
+        [Parameter(Mandatory, position=0)]
+        [string]$inputXML,
+
+        [Parameter(position=1)]
+        [string]$customThemeName = 'matrix',
+
+        [Parameter(position=2)]
+        [string]$defaultThemeName = '_default'
+    )
+
+    try {
+        # Note:
+        #    Reason behind not caching the '$sync.configs.themes` object into a variable,
+        #    because this code can modify the themes object.. meaning it's better to access it
+        #    using the more verbose way, rather than introduce possible bugs into the code, just for the sake of readability.
+        #
+        if (-NOT $sync.configs.themes) {
+            throw [GenericException]::new("[Set-WinUtilTheme] Did not find 'config.themes' inside `$sync variable.")
+        }
+
+        if (-NOT $sync.configs.themes.$defaultThemeName) {
+            throw [GenericException]::new("[Set-WinUtilTheme] Did not find '$defaultThemeName' theme in the themes config file.")
+        }
+
+        $themeToUse = $customThemeName
+        if ($sync.configs.themes.$themeToUse) {
+            # Loop through every default theme option, and modify the custom theme in $sync variable,
+            # so that it has full options available for other functions to use.
+            foreach ($option in $sync.configs.themes.$defaultThemeName.PSObject.Properties) {
+                $optionName = $option.Name
+                $optionValue = $option.Value
+                if (-NOT $sync.configs.themes.$themeToUse.$optionName) {
+                    $sync.configs.themes.$themeToUse | Add-Member -MemberType NoteProperty -Name $optionName -Value $optionValue
+                }
+            }
+        } else {
+            Write-Debug "[Set-WinUtilTheme] Theme '$customThemeName' was not found, using '$defaultThemeName' instead."
+            $themeToUse = $defaultThemeName
+        }
+
+        foreach ($property in $sync.configs.themes.$themeToUse.PSObject.Properties) {
+            $key = $property.Name
+            $value = $property.Value
+            # Add curly braces around the key
+            $formattedKey = "{$key}"
+            # Replace the key with the value in the input XML
+            $inputXML = $inputXML.Replace($formattedKey, $value)
+        }
+    }
+    catch {
+        Write-Host "[Set-WinUtilTheme] Unable to apply theme" -ForegroundColor Red
+        Write-Host "$($psitem.Exception.Message)" -ForegroundColor Red
+        $inputXML = "" # Make inputXML equal an empty string, indicating something went wrong to the function caller.
+    }
+
+    return @($inputXML, $themeToUse);
+}
diff --git a/functions/private/Set-WinUtilUiTheme.ps1 b/functions/private/Set-WinUtilUiTheme.ps1
deleted file mode 100644
index 45db1ab4..00000000
--- a/functions/private/Set-WinUtilUiTheme.ps1
+++ /dev/null
@@ -1,50 +0,0 @@
-function Set-WinUtilUITheme {
-    <#
-        .SYNOPSIS
-            Sets the theme of the XAML file
-
-        .PARAMETER inputXML
-            A string representing the XAML object to modify
-
-        .PARAMETER themeName
-            The name of the theme to set the XAML to. Defaults to 'matrix'
-
-        .EXAMPLE
-            Set-WinUtilUITheme -inputXAML $inputXAML
-    #>
-
-    param
-    (
-         [Parameter(Mandatory, position=0)]
-         [string]$inputXML,
-         [Parameter(position=1)]
-         [string]$themeName = 'matrix'
-    )
-
-    try {
-        # Convert the JSON to a PowerShell object
-        $themes = $sync.configs.themes
-        # Select the specified theme
-        $selectedTheme = $themes.$themeName
-
-        if ($selectedTheme) {
-            # Loop through all key-value pairs in the selected theme
-            foreach ($property in $selectedTheme.PSObject.Properties) {
-                $key = $property.Name
-                $value = $property.Value
-                # Add curly braces around the key
-                $formattedKey = "{$key}"
-                # Replace the key with the value in the input XML
-                $inputXML = $inputXML.Replace($formattedKey, $value)
-            }
-        } else {
-            Write-Host "Theme '$themeName' not found."
-        }
-
-    } catch {
-        Write-Warning "Unable to apply theme"
-        Write-Warning $psitem.Exception.StackTrace
-    }
-
-    return $inputXML;
-}
diff --git a/scripts/main.ps1 b/scripts/main.ps1
index f5c9b978..5f93cd39 100644
--- a/scripts/main.ps1
+++ b/scripts/main.ps1
@@ -52,6 +52,7 @@ $sync.runspace.Open()
 
 $inputXML = $inputXML -replace 'mc:Ignorable="d"', '' -replace "x:N", 'N' -replace '^<Win.*', '<Window'
 
+$defaulttheme = '_default'
 if ((Get-WinUtilToggleStatus WPFToggleDarkMode) -eq $True) {
     if (Invoke-WinUtilGPU -eq $True) {
         $ctttheme = 'Matrix'
@@ -61,15 +62,28 @@ if ((Get-WinUtilToggleStatus WPFToggleDarkMode) -eq $True) {
 } else {
     $ctttheme = 'Classic'
 }
-$inputXML = Set-WinUtilUITheme -inputXML $inputXML -themeName $ctttheme
+
+$returnVal = Set-WinUtilUITheme -inputXML $inputXML -customThemeName $ctttheme -defaultThemeName $defaulttheme
+if ($returnVal[0] -eq "") {
+    Write-Host "Failed to statically apply theming to xaml content using Set-WinUtilTheme, please check previous Error/Warning messages." -ForegroundColor Red
+    Write-Host "Quitting winutil..." -ForegroundColor Red
+    $sync.runspace.Dispose()
+    $sync.runspace.Close()
+    [System.GC]::Collect()
+    exit 1
+}
+$inputXML = $returnVal[0]
+$ctttheme = $returnVal[1]
 
 [void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
 [xml]$XAML = $inputXML
 
 # Read the XAML file
+$readerOperationSuccessful = $false # There's more cases of failure then success.
 $reader = (New-Object System.Xml.XmlNodeReader $xaml)
 try {
     $sync["Form"] = [Windows.Markup.XamlReader]::Load( $reader )
+    $readerOperationSuccessful = $true
 } catch [System.Management.Automation.MethodInvocationException] {
     Write-Warning "We ran into a problem with the XAML code.  Check the syntax for this control..."
     Write-Host $error[0].Exception.Message -ForegroundColor Red
@@ -81,13 +95,20 @@ try {
     Write-Host "Unable to load Windows.Markup.XamlReader. Double-check syntax and ensure .net is installed."
 }
 
-
 # Load the configuration files
 #Invoke-WPFUIElements -configVariable $sync.configs.nav -targetGridName "WPFMainGrid"
 Invoke-WPFUIElements -configVariable $sync.configs.applications -targetGridName "appspanel" -columncount 5
 Invoke-WPFUIElements -configVariable $sync.configs.tweaks -targetGridName "tweakspanel" -columncount 2
 Invoke-WPFUIElements -configVariable $sync.configs.feature -targetGridName "featurespanel" -columncount 2
 
+if (-NOT ($readerOperationSuccessful)) {
+    Write-Host "Failed to parse xaml content using Windows.Markup.XamlReader's Load Method." -ForegroundColor Red
+    Write-Host "Quitting winutil..." -ForegroundColor Red
+    $sync.runspace.Dispose()
+    $sync.runspace.Close()
+    [System.GC]::Collect()
+    exit 1
+}
 
 #===========================================================================
 # Store Form Objects In PowerShell
diff --git a/xaml/inputXML.xaml b/xaml/inputXML.xaml
index 5ab92330..db4be1a9 100644
--- a/xaml/inputXML.xaml
+++ b/xaml/inputXML.xaml
@@ -305,13 +305,13 @@
                         <Grid Background="{TemplateBinding Background}" Margin="{CheckBoxMargin}">
                             <BulletDecorator Background="Transparent">
                                 <BulletDecorator.Bullet>
-                                    <Grid Width="{CheckBoxBulletDecoratorFontSize}" Height="{CheckBoxBulletDecoratorFontSize}">
+                                    <Grid Width="{CheckBoxBulletDecoratorSize}" Height="{CheckBoxBulletDecoratorSize}">
                                         <Border x:Name="Border"
                                                 BorderBrush="{TemplateBinding BorderBrush}"
                                                 Background="{ButtonBackgroundColor}"
                                                 BorderThickness="1"
-                                                Width="{Binding Path={CheckBoxBulletDecoratorFontSize}-2}"
-                                                Height="{Binding Path={CheckBoxBulletDecoratorFontSize}-2}"
+                                                Width="{Binding Path={CheckBoxBulletDecoratorSize}-2}"
+                                                Height="{Binding Path={CheckBoxBulletDecoratorSize}-2}"
                                                 Margin="2"
                                                 SnapsToDevicePixels="True"/>
                                         <Path x:Name="CheckMark"
@@ -773,7 +773,7 @@
                 HorizontalAlignment="Right" VerticalAlignment="Top"
                 Margin="0,5,5,0"
                 FontFamily="Arial"
-                Foreground="{MainForegroundColor}" FontSize="{IconFontSize}" Name="WPFCloseButton" />
+                Foreground="{MainForegroundColor}" FontSize="{CloseIconFontSize}" Name="WPFCloseButton" />
             </Grid>
 
         </DockPanel>