However, for what it's worth, I've put the current version I use as is -- with a few updates to make it more friendly, I hope (though the controls are still not those of your regular windows app) -- so that it can now edit quite almost everything within a dungeon file (specially text editing was missing in previous versions).
Here are some visuals:


Map header info:

New text editor:

More help info within the application:

Visual list of creatures within dungeon:

Visual list of items within dungeon:

I also wrote a guide for it that you can find here:
https://dmbuilder.sphenxmusics.fr/files/DMBuilder.pdf
And for bonus:
I've made adaptation to compile it with MinGW, and for Linux.
I've made almost 95% of its code published on GitHub (old student code, plenty of quick and dirt code ...)
https://github.com/gbsphenx/dmbuilder
I really wanted to build this release and deliver something more complete than before in order to make a good step with DMBuilder and be able to move on with other projects.

