You might want to consider a fresh install? I don't have any issues switching here... You are removing the ' ; ' (semicolon) at the beginning of the line, right? So it should read: snes_emulator=snes9x NOT: **;**snes_emulator=snes9x ??? Don't know what else it could be... did you by chance change write permission inadvertently? I just access the conf via samba \recalbox (or, \ip.address) and edit with notepad++ ...again, no issues here.