For the ones I use, as of a few days ago:
05: CPS2
08: fceumm
09: gambatte
10: genesis_plus_gx
25: snes9x2005
28: stella
31: vba_next
Also, if you make any good icons, please share them :) Mine are a bit rough around the edges.
Maybe try deleting config in (/ux0:/data/retroarch). I had some GUI problems until I did that.
Does anyone know how to change the Retroarch menu buttons so that X is confirm and O is back?
Thanks for the work, Libretro, etc.