Proper retroarch.cfg file needed

Just unpacked my GS, assembled it, started the software and almost immediately messed up my retroarch.cfg.
Can anyone provide a fully setup retroarch.cfg, because when restoring mode and resolution (ans almost everything else) do not fit any more.
Thank you in advance

more or less solved. in the .config directory a backup of the original config file named retroarch.cfg.bak is located, solved my issue