I am really, really puzzled then. I don't know what to tell you or what else can it be. Its been running fine for everyone else, so I can only imagine that there is a problem with your particular setup... The only thing that makes sense to me is the game not having permission to access the save location.
I made another build just to see if that is really the case, I bypassed the whole loading process just to see if the main menu opens. You can download it
here.
If you can see the menu with this build than it really is a case of the game not being able to reach the save folders. Which means that even if you can start the game now you won't be able to save it before fixing that. If the main menu doesent show up though... I will have no idea what might be going on...