When Connect comes out, will it be possible to edit the GUI?
The way you do with the regular BL GUI now, except in the .zip folder in which RTB is held?
Depends, why?
On another note, I'm thinking of a new feature for the downloads system which is "file locking".
One of the issues with RTB's moderation system is that if someone submits a broken update for a file it will be instantly distributed to all the users after it's been approved. Mod Reviewers don't actually ensure the add-on works before approving them - downloading each file and trying it in-game would be way too time consuming for all the files getting submitted to us.
File locking would enable us to totally disable the add-on for all RTB users as well as prevent it from being downloaded until the author has fixed the file. Once it was fixed it could be used in-game and downloaded again.