I see you you still haven't found how to modify the title screen (or the beta)
Hope you wouldn't give up on it
EDIT: for some reason it doesn't seem to work for me.
When I load setup it's stuck indefinitely on "Installing NET Frameworks 4.5", and clicking on the various other files yield "application not formatted correctly".
RE-EDIT: Never mind. It worked (after a looooong wait, like 15 minutes or so)
But when I load Tileset 116 it doesn't show the font fully, and there's no way to make the viewer's window scroll down to see the rest of it. Any solutions?