Hi, not the original poster, but similar issue. I deleted what I had (Win 1.0.4) and tried a fresh download. Don't know why, but the exe file wasn't there, again, so I rinsed and repeated. I guess third times the charm, eh? Still having problems though, because KSP will start, but then freezes on the load screen. For the sake of experimentation, I deleted the part file that it was hung up on (one of the Squad engines, but I don't recall now), and tried loading again. Loaded past that point, then froze on some other random part file. I figure the download was corrupted or something, so I'm currently installing again. Crossing my fingers.