Hi and thanks for your response. :)

Yes I am pressing the key during the game. To be honest I’ve tried it all ways but it does not respond either way. I’m also noticing other keys don’t work, such as shader selection using the n and m keys, but other inputs do such as my button 8 and 9 hotkey exit as detailed here elsewhere.

I don’t really know what’s happening but could it be something to do with the new read-only permissions on the file in 2.2? Can the Retropie system not access it properly perhaps? Just a stab in the dark.