Thank-you so much for this!!! It worked perfectly, I just copy and pasted it into the Autohotkey tab for each of the emulators in Launchbox and it immediately worked. I ended up changing it to 1 & 2, so that I can just press the player 1 and 2 buttons down together for 2 seconds on the Arcade Tankstick and it works perfectly to exit back to Big Box mode. Now I can actually start playing some games instead of trying to figure out how to make things work
Really appreciate how quickly you provided the solution, hopefully if anyone else is having similar issues they will find this thread.