Holy

ing shit, you have to be kidding me. I used ProEdit 1.4.2 three times, and three times it must have completely corrupted my maps, the first being my big project because nothing could open them whatsoever, StarCraft included.
*Edit* This was after compressing and saving the maps.
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Worked fine for me. I actually tested it. Try it on some random map, and describe the corruption some more.