Hey guys,
We've finally tracked down the root cause of most (if not all) of our crash on startup problems. It seems that it is caused by users who do not have Windows Service Pack 1 installed for Windows 7. We've tested this fix with several players who were having the problem and it has solved it for all of them.
Please see this thread for more details: http://steamcommunity.com/app/214190/discussions/0/558756256138718149/