Action path:

Created a map and tested importing 3d object (tent) --> placed tent 3 tiles away from the edge of the map --> saved & quit game --> opened game --> now cannot delete 3d object (tent) by any method --> tried to rotate tent or change tent's parameters and game always crashes

What DOES work:

Edit map to be smaller dimensions, then re-edit map to original large dimensions, now the tent is gone!

System: Windows 11 Pro, RPG Paper Maker v.2.0.11