Add optional debug tracing and final pause

- Add $debugTrace flag instead of uncommenting to to debug
- Add a Read-Host pause at the end when debug tracing is enabled so output can be examined.
- Fix consistency of reg call

Startup Scripts/SandboxStartup.ps1

@@ -5,7 +5,10 @@ param(
     [switch]$launchingSandbox
 )
 
-#Set-PSDebug -Trace 1
+# Set to $true to enable debug tracing of the script.
+$debugTrace = $false
+
+if ($debugTrace) { Set-PSDebug -Trace 1 }
 
 # ------ Check that we're running in the Windows Sandbox ------
 # This script is intended to be run from within the Windows Sandbox. We'll do a rudamentary check for if the current user is named "WDAGUtilityAccount"
@@ -17,7 +20,7 @@ if ($env:USERNAME -ne "WDAGUtilityAccount") {
 }
 
 # Change context menu to old style
-reg.exe add "HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32" /f /ve
+reg add "HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32" /f /ve
 
 # Show file extensions
 reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v "HideFileExt" /t REG_DWORD /d 0 /f
@@ -142,3 +145,5 @@ if ($launchingSandbox) { Start-Process explorer.exe C:\Users\WDAGUtilityAccount\
 # Uncomment to pause after running
 #Read-Host "Pause"
 
+# If set to trace debug by uncommenting "Set-PSDebug -Trace 1" above, pause at the end so you can see the debug output
+if ($debugTrace) { Read-Host "Debug trace complete, press Enter to exit." }