diff --git a/README.md b/README.md
index b451a4c..d2b350e 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ This script automatically copies the resources and creates shortcuts to ensure e
 - Run `install.ps1` in an administrator powershell prompt
   - requires admin access to i) modify registry entries to change file association to script and ii) copy icons and stylesheet to intel Quartus directory
 - Optional: Rename or remove the old shortcut. This depends on your installation (Mine is under `C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Intel FPGA 23.1std.1.993 Lite Edition\Quartus Prime Lite Edition 23.1std.1.993`)
+- RTL view: Select custom theme for dark mode colors
 
 ## Images
 
@@ -21,6 +22,8 @@ This script automatically copies the resources and creates shortcuts to ensure e
 
 ![Dark mode report view image](sample2.png)
 
+![Dark mode RTL view image](sample3.png)
+
 ## Attribution
 
 See `LICENSE.md` for
diff --git a/dark_icons/light/window_close.png b/dark_icons/light/window_close.png
new file mode 100644
index 0000000..79f16fe
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diff --git a/dark_icons/light/window_close@2x.png b/dark_icons/light/window_close@2x.png
new file mode 100644
index 0000000..7152832
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diff --git a/dark_icons/light/window_close_disabled.png b/dark_icons/light/window_close_disabled.png
new file mode 100644
index 0000000..6fafd3a
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diff --git a/dark_icons/light/window_close_disabled@2x.png b/dark_icons/light/window_close_disabled@2x.png
new file mode 100644
index 0000000..0a852da
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diff --git a/dark_icons/light/window_close_focus.png b/dark_icons/light/window_close_focus.png
new file mode 100644
index 0000000..5745d2a
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diff --git a/dark_icons/light/window_close_focus@2x.png b/dark_icons/light/window_close_focus@2x.png
new file mode 100644
index 0000000..f5bc168
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diff --git a/dark_icons/light/window_close_pressed.png b/dark_icons/light/window_close_pressed.png
new file mode 100644
index 0000000..c8dca67
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diff --git a/dark_icons/light/window_close_pressed@2x.png b/dark_icons/light/window_close_pressed@2x.png
new file mode 100644
index 0000000..d0ec9a5
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diff --git a/darkstyle.qss b/darkstyle.qss
index 74bcf26..2001b2c 100644
--- a/darkstyle.qss
+++ b/darkstyle.qss
@@ -37,6 +37,28 @@ QToolBar * {
   padding: 0px;
 }
 
+/* For some reason I can't set the background color of the window manager tabs
+in RTL viewer, so I am just going to make it have the defualt white background
+and black text */
+NUIQ_MDI_AREA QTabBar::tab {
+  color: #19232D;
+}
+
+NUIQ_MDI_AREA QTabBar::close-button {
+  border: 0;
+  margin: 0;
+  padding: 4px;
+  image: url(":/dark_icons/light/window_close.png");
+}
+
+NUIQ_MDI_AREA QTabBar::close-button:hover {
+  image: url(":/dark_icons/light/window_close_focus.png");
+}
+
+NUIQ_MDI_AREA QTabBar::close-button:pressed {
+  image: url(":/dark_icons/light/window_close_pressed.png");
+}
+
 /* QWidget ----------------------------------------------------------------
 
 --------------------------------------------------------------------------- */
diff --git a/install.ps1 b/install.ps1
index 17a7304..3910591 100644
--- a/install.ps1
+++ b/install.ps1
@@ -47,7 +47,7 @@ $WScriptShell = New-Object -ComObject WScript.Shell
 $shortcut = $WScriptShell.CreateShortcut("$env:APPDATA\Microsoft\Windows\Start Menu\Programs\Quartus.lnk")
 $shortcut.TargetPath = "wscript.exe"
 $shortcut.Arguments = "`"$env:APPDATA\Microsoft\Windows\Start Menu\Programs\Quartus.vbs`""
-$shortcut.WorkingDirectory = "D:\intelFPGA_lite\23.1std"
+$shortcut.WorkingDirectory = $(Split-Path $installPath)
 $shortcut.IconLocation = "$installPath\bin64\quartus.exe,0"
 $shortcut.Save()
 
@@ -57,7 +57,8 @@ $scriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
 $content = Get-Content "$scriptDir\darkstyle.qss"
 $styleWithPath = $content -replace 'url\(":/dark_icons', "url(`"$($installPath -replace '\\', '/')/ZZZ_dark_icons"
 Set-Content -Path "$installPath\darkstyle.qss" -Value $styleWithPath
-Copy-Item -Path "$scriptDir\dark_icons" -Destination "$installPath\ZZZ_dark_icons" -Recurse -Force
+New-Item -Force -Type Directory "$installPath\ZZZ_dark_icons"
+Copy-Item -Path "$scriptDir\dark_icons\*" -Destination "$installPath\ZZZ_dark_icons" -Recurse -Force
 
 Write-Output "Rewrite registry entries for file association open commands"
 
@@ -85,13 +86,14 @@ $quartusSettingsPath = "$HOME\quartus2.qreg"
 if (Test-Path $quartusSettingsPath) {
     $suffix = 1
     do {
-        $quartusBakPath = [System.IO.Path]::ChangeExtension($quartusSettingsPath, "$suffix" + [System.IO.Path]::GetExtension($quartusSettingsPath))
+        $quartusBakPath = [System.IO.Path]::ChangeExtension($quartusSettingsPath, "$suffix" + "_backup" + [System.IO.Path]::GetExtension($quartusSettingsPath))
         $suffix++
     } while (Test-Path $quartusBakPath)
 }
 
 Copy-Item -Path $quartusSettingsPath -Destination $quartusBakPath
 $replacements = @{
+    # Scintilla based text editor
     "Altera_Foundation_Class\\AFCQ_TED_KEYWORD_COLOR.+" = "Altera_Foundation_Class\AFCQ_TED_KEYWORD_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xff\xff\xff\xff\xff\xff\0\0)"
     "Altera_Foundation_Class\\AFCQ_TED_NORMAL_COLOR.+" = "Altera_Foundation_Class\AFCQ_TED_NORMAL_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xdf\xdf\xe1\xe1\xe2\xe2\0\0)"
     "Altera_Foundation_Class\\AFCQ_TED_BACKGROUND_COLOR.+" = "Altera_Foundation_Class\AFCQ_TED_BACKGROUND_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x19\x19##--\0\0)"
@@ -109,6 +111,20 @@ $replacements = @{
     "Altera_Foundation_Class\\AFCQ_TED_STRING_COLOR.+" = "Altera_Foundation_Class\AFCQ_TED_STRING_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xe8\xe8\0\0\xe8\xe8\0\0)"
     "Altera_Foundation_Class\\AFCQ_TED_IDENTIFIER_COLOR.+" = "Altera_Foundation_Class\AFCQ_TED_IDENTIFIER_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xe8\xe8\0\0\xe8\xe8\0\0)"
     "Altera_Foundation_Class\\AFCQ_MSW_INFO_COLOR.+=" = "Altera_Foundation_Class\AFCQ_MSW_INFO_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\0\0\xc0\xc0\0\0\0\0)"
+
+    # RTL viewer
+    "Altera_Foundation_Class\\AFCQ_NUI_BACKGROUND_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_BACKGROUND_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x19\x19##--\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_INSTANE_FONT_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_INSTANE_FONT_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xff\xff\0\0\xff\xff\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_RIPPER_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_RIPPER_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\0\0\xff\xff\xff\xff\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_NET_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_NET_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xff\xff\xff\xff\0\0\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_PIN_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_PIN_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\0\0\xff\xff\xff\xff\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_PORT_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_PORT_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\0\0\xff\xff\xff\xff\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_PRIMITIVE_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_PRIMITIVE_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x1a\x1arr\xbb\xbb\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_SELECTION_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_SELECTION_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\xff\xff\0\0\0\0\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_INSTANCE_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_INSTANCE_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\0\0\x80\x80\0\0\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_INSTANCE_REGION_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_INSTANCE_REGION_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x37\x37\x41\x41OO\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_INSTANCE_ATOM_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_INSTANCE_ATOM_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x1a\x1arr\xbb\xbb\0\0)"
+    "Altera_Foundation_Class\\AFCQ_NUI_ENCRYPTED_INSTANCE_COLOR.+" = "Altera_Foundation_Class\AFCQ_NUI_ENCRYPTED_INSTANCE_COLOR=@Variant(\0\0\0\x43\x1\xff\xff\x45\x45SSdd\0\0)"
 }
 $quartusSettings = Get-Content -Path $quartusSettingsPath -Raw
 foreach ($key in $replacements.Keys) {
diff --git a/sample3.png b/sample3.png
new file mode 100644
index 0000000..f160e9d
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