First of all, please make sure you’ve read this thread – we just updated it with new info last week: discourse.stonehearth.net/t/crashing-on-start-read-this-updated-october-7/13297/
Also, it’s possible your problem could be Steam-related; check to make sure Stonehearth isn’t still running – go to Task Manager and stop any Stonehearth-related processes, then restart in Steam.