I fired up the Anbernic RG35XX this morning and it worked fine for a bit and then started flashing and games would launch and then immediately quit. The whole screen was flashing / blinking. I tried the stock OS on the original SD card and it worked fine. I ended up doing a fresh install of GarlicOS on a new SD card and that was fine, so I guess my original install hosed itself somehow. Anyone else have issues like that?
Do you know what caused the corruption to your retroarch.cfg? It may be useful information for people who experience the same behaviour and stumble on your post.