Ok so I was working on making a map and everything was going smoothly - I'd made the cell, made some buildings, got them loaded and could see them in tilezed. Everything was going smoothly - until it wasn't, and when I went to make a new building I discovered that any time I tried to change a building's properties the program would crash on me. After a few frustrated attempts at restarting the program (and my computer) with no results, I gave up and decided to redownload the program in hopes that would fix it. That obviously didn't work, because here we are.
The empty map looks okay, but when I open the building editor I'm greeted by nothing but red question marks. When I place a building that I had made previously, it displays as red question marks. I'm assuming that the program isn't loading the tilesets correctly based on that, but I'm not sure why this has happened or how to fix it. Is there any chance anyone here knows what has happened and how I could fix it?