@bshogeman said in Hotkeys such as select+start don't work any more.:

I must not touch the menu item retropie -> retroarch. Don't update anything within that app.

To be more precise about the danger of this "app": Do NOT enable "Save Configuration on Exit".

Can anyone tell me what files to delete, replace, recover to fix this problem without reinstalling everything again?

Look for the retroarch.cfg.rp-dist files and replace the retroarch.cfg files with those.

Example:

mv /opt/retropie/configs/all/retroarch.cfg.rp-dist /opt/retropie/configs/all/retroarch.cfg mv /opt/retropie/configs/nes/retroarch.cfg.rp-dist /opt/retropie/configs/nes/retroarch.cfg mv /opt/retropie/configs/snes/retroarch.cfg.rp-dist /opt/retropie/configs/snes/retroarch.cfg # repeat it for other systems

More info about this kind of issue here and here.

@cs00110
Here is the documentation for the retroarch.cfg files:
https://github.com/RetroPie/RetroPie-Setup/wiki/RetroArch-Configuration#hardcoded-configurations

@tcmt which config ? Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first (You don't provide which version of retropie for example which affects the path im about to give you)

you should edit /opt/retropie/configs/all/retroarch/autoconfig/YOURJOYPAD.cfg and change the hotkey button in there.