Using App Name from BTT Variable in an Applescript to Quit Application

Configuration Help & General Discussion
1

So I'm trying to create a flow where if I hit cmd+W BTT will run a script that checks if all windows have been closed and Quit the app. I managed to do this with this by creating a flow of:

  1. cmd+W
  2. wait 3 sec
  3. Run this script (Stickies in this example)
set timeoutLimit to 5
set startTime to (current date)

repeat
	tell application "System Events"
		if application process "Stickies" exists then
			set stickiesProcess to application process "Stickies"
			set stickyWindows to windows of stickiesProcess
			-- Quit Stickies only if no windows are open
			if (count of stickyWindows) is 0 then
				tell application "Stickies" to quit
				exit repeat
			end if
		end if
	end tell
	
	-- Check if 5 seconds have passed
	set elapsedTime to (current date) - startTime
	if elapsedTime ≥ timeoutLimit then
		exit repeat
	end if
end repeat

However, I want to create a CONDITIONAL ACTIVATION GROUP for specific apps, and change this flow by altering the above script to instead use a BTT variable to quit the app. Example:

  1. Set Active App Name to Persistant Variable (THIS WORKS SUCCESSFULLY)
tell application "BetterTouchTool"
	set_persistent_string_variable "lastActiveApp" to get_string_variable "active_app_name"
end tell
  1. cmd+W
  2. wait 3 sec
  3. Run Script that quits the app name under the variable "lastActiveApp" <-THIS IS THE STEP IM STRUGGLING WITH

Tried asking ChatGPT and Gemini with no help. This is what ChatGPT came up with but doesn't work:

set timeoutLimit to 5
set startTime to (current date)

-- Retrieve the last active app name from BTT persistent variable
tell application "BetterTouchTool"
	set lastActiveApp to get_string_variable "lastActiveApp"
end tell

repeat
	tell application "System Events"
		-- Check if the last active app process exists
		if application process lastActiveApp exists then
			set appProcess to application process lastActiveApp
			set appWindows to windows of appProcess
			
			-- Quit the app only if no windows are open
			if (count of appWindows) is 0 then
				tell application lastActiveApp to quit
				exit repeat -- Exit the loop after quitting
			end if
		end if
	end tell
	
	-- Check if 5 seconds have passed (timeout)
	set elapsedTime to (current date) - startTime
	if elapsedTime ≥ timeoutLimit then
		exit repeat
	end if
	
	delay 0.1 -- Small delay to avoid excessive CPU usage
end repeat

Anyone got any ideas? Would be much appreciated.