I have to post this because it's bugging the people here big time. When you use the Retro arch version with the SNES next fix, the switching of cores crashes the system. However if you use the one before the snes next fix you can change cores without it freezing, this is why I had to downgrade from V0.9.7.2 to V0.9.7.1 and had NO problems with switching cores within retro arch.