Doomsday Engine

So it seems to be more than just Doom64 Absolution, I half suspect it is every single time you add an iWad folder, how do I suspect this:

1. I came across another Doom64 Absolution wad apparently made for Doomsday, after copying it into the Doom64 Absolution folder, Doomsday now recognizes Doom64, and it is set to the default Doom64 Absolution under "other games" showing a nice icon, and I can play it.

2. A Freedoom.wad came with a Brutal Doom download, and I noticed FreeDoom phase 1 and 2 under the Doom64 Absolution entry. So I copied FreeDoom.wad to its own FreeDoom folder, and added that folder to the iWad folders; boom same crash as Doom64 Absolution.

3. Going to the FreeDoom website itself I noticed them talking about phase 1 and 2 as in Doomsday Engine, so I downloaded their zip file and it contained freedoom1.wad and freedoom2.wad. Figuring that it may have something to do with a bad .wad file, I removed freedoom.wad and the original absolution wad from their respective folders, removed the folders from the iwad options, and then added the iwad folders again, and nope, still that same crash.

4. Unlike Absolution though, Freedoom phase 1 and 2 are still not auto-recognized by Doomsday Engine.

So, it seems then that adding an iwad folder and clicking close equals this crash regardless of what's in it.