Today I installed a fresh RetroPie 3.0. When pressing ‘x’ at rom loading and selecting a different default emulator, I get:
‘Error: Specified Video Plugin not found: ‘mupen64plus-video-n64.so’
Same with ‘mupen64plus-video-rice.so’
Only ‘lr-mupen64plus’ works, but with many graphic glitches (e.g. in Mario Kart)