@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