I have been using many version of dolphin and they have all worked perfectly but I tried starting a netplay game with somebody who was playing on a Mac and since then, I can't play Super Smash Bros. Melee on any version of dolphin. Everytime I try to start the game ( Singleplayer or Netplay), there's just a black screen and nothing happens. It was working the same day before I tried playing with that person... and they got the same problem too I think. I tried with a different iso of the game and it still doesn't work. I tried 5 different versions of dolphin and even the latest didn't work. Anybody has any solution? 
Edit : Nevermind, somebody found the solution for me. Had to delete Dolphin Emulator folder in Documents.
Edit : Nevermind, somebody found the solution for me. Had to delete Dolphin Emulator folder in Documents.