Hmm I wonder why it’s like this. If it can run on 32bit but not on 64bit, it’s most probably caused by some security software. Have you checked thorougly the list on the Crashing on start thread to see if you have any of those applications installed / running?
If it’s caused by your antivirus or firewall, and disabling it makes the game work, try adding an exception for Stonehearth.