Edit: Building in VS2012 worked flawlessly and the FileLoadException is no longer thrown. Here's an x86 build that you can try:
The new build seems to work for me, at least running from a distant directory. I'll just have to call it good and hope that this doesn't come up in the next update!
The ?.* error is odd though, I'll have to look into that.
// regressions: - Name is untitled when loading files. - Person names no longer updating on copy. - Renaming doesn't work for file with same name. - Windowstyle editor clobbered. - Selecting last tile in a tileset causes an index exception.// bugs: - Clicking spriteset frame doesn't set the index in tileset. - Color picker not selecting old color in font importer.