Hi Burr / Brian - re: deselect part, there are some notes here for how to set that one part up:

http://moi3d.com/forum/index.php?webtag=MOI&msg=1996.13


There is a fair amount of new stuff in the UI in this beta release, so you can't just copy an older version's UI file over top of it or else you'll lose all the new stuff.

Because each beta is kind of a changing and moving target, I'd generally recommend holding off on customizations until v2 is all wrapped up and isn't in flux anymore. But of course you're more than welcome to give it a try if you want - I just won't really be able to focus on it very much myself until things have stabilized.

- Michael