That's really odd, I haven't heard of any issues like that so far - like the game usually takes some time to open on the first try since it's setting things up but will launch fine / faster every other time. It makes a new SAV file when you open it for your saves but I don't think it should be hundreds of MB worth - what do you mean by hung completely? It would help if I could also know if you're running the game on a Mac or Windows - I tried downloading the Windows version of my game from here just now on a clean PC and it opened after 1 min and ran fine.