First, a more general problem, all of the editors tend to not fully clear their states when you exit back to the menu and re-enter them. Case-in-point being, if I want to start a new map by exiting the level editor and re-entering it, all of the mobs still have the skins of the previously loaded map. (And, as an aside, apparently loading a Workshop map overwrote all of my troll mode dialogues with what that author was using...?)

But, more specifically, there doesn't appear to be a way to un-skin objects once you've skinned them. I tried applying a character skin to the door object type, just to see how it would work, and now all of my doors are permanently stuck like that and I basically have to erase the map, exit the game completely, and start over if I want the doors to go back to normal?

Am I missing something? When selecting a skin to use, it uses the normal character selection... Except selecting "Ghost" doesn't function as a default option and I don't see any other way to just... Un-skin it again...