The game frame rate has Increased by 60%~120%
Game Saved directory has been move to .../Users/AppData/Local/SuperSmash/Saved.
When you launch the game it will automatically migrate your saving data(player setttings and custom maps) to the new place.
If your maps disappear, you will have to manually copy the folder from (your game directory)/SuperSmash/Saved to the new save directory, paste and override it, it should be fixed.