Reply To: Retropie 3 beta 2 issue – unable to 'Configure Retroarch Controller'

[Floob]

If you are comfortable registering new RetroArch controllers in the setup menu, delete the files here:
/opt/retropie/emulators/retroarch/configs/

Then recreate your config file, then it will be very obvious which one it is.
But regardless the text that appears in yellow when you start a game should show the full filename of the file it loads, can you catch what it is?