NEED HELP WITH SNES EMULATOR

i am having trouble with the emulator , it worked fine bfore but now i press pause to save and the screen is black but the menus there, and apart from that the emulation ha got slow

Did you change any settings? If so, try changing them back and see if that fixes it.

If that doesn't work, try redownloading it, in case somehow a file got corrupted or something.