Have you tried reinstalling and patching wc3?. I just have wc3 at 1.22 and just started the editor up with no problem. Reinstalling/Reformatting is how i solve everything.
If your copy of windows legit and do you have all the latest updates and stuff? I know something require .NET Framework 2.0 or whatever, not sure about wrold edit but it would hurt ( I dont think WE would start if it required that and you didn't have it). These are just the things i can come up with now, did i mention you sshould try reinstalling? Don't mess with your war3.exe either for cracking the game, newest version doesnt even need it now