The behaviour in map editor was the same as in play mode, so that only props owned by the player (Underlord 1) could be toggled.
Now the map editor supports to toggle props of any faction.

Made sure Abilities can not applied on grabbed objects and conditions are frozen during grab time.

Hello Jheames,
some security software can see the game as false positive because of an aggressive heuristic (so far only happened with AVG Antivirus).
In this case you need to add an exception for WFTOGame.exe so the game is not blocked.

If this is not the cause, since an issue with wireless USB devices is known, just try to unplug any wireless USB device when starting the game to make sure its not the cause.

Other standard startup issues can be found here:
http://steamcommunity.com/app/230190/discussions/0/523890681426547342/

Please let us know if any of these recommendations helped and which.

Cheers

Since no further crahses were reported and the crashes were likely caused by the known Unity bug related to USB audio.
I think we can close this report.