You're *really* not going to like the answer :(
It looks like you exported a 3ds over your dungon builder file. This is really a .3ds file and I was able to open it with OpenZone. If you open it with Notepad you'll see that it's a binary file. If you open any of the other .dbx files that came with Dungeon Builder you'll see what a .dbx file is supposed to look like.
|