Then click on some other player and set 'Control' to computer.
Make sure that 'Player 1' 'Control' is set to user because thats u. After u opened it, like Copernic said, clik on 'Map' and then 'Player Properties'. SC2map and then u will be able to open it with Map Editor. If u download them from Nibbits, you have to change the extension from. If u have cracked version of the game u need to download melee maps first.
