I created the AHK script to exit with ESC and Reload with Middle Click (since Right Click is used):
;*******JUST CHANGE THE PATH TO "DeathLive.exe" ACCORDING TO YOUR SETTING
Run, L:\Lightgun\Death Live 1.0.2\DeathLive.exe
MButton::r
Escape::
Process,Close,DeathLive.exe
Run,taskkill /im "DeathLive.exe" /F
ExitApp
return