That all looks good. What version Citra are you on?
 
	If you open Citra and just run a game there does hitting either Ctrl+Q or Alt+F4 close Citra?
 
	Can you try below. I doubt it is the AHK script since even the script to send Fullscreen is not working. But worth a try.
 
ESC::
{	
    SetTitleMatchMode, 2
    WinWaitActive, citra
    Send !{f4}
    		break	
}