You're very welcome. You're work on the UI was definitely worth it.
What great questions.
How I installed 4.0. I hesitated over that and decided since I could have trouble with 2 instances installed (although low risk if original deactivated) and it was a beta (like Forrest Gump's box of chocolates, if you know what I mean), I thought it was probably a good idea to delete the current version and start with 4.0 fresh.
If you do ANYTHING to it from here and want me to try another beta, I'll do it manually (assuming to deactivate current before uploading the zip) to see how things would go.
Now, regarding the settings, now that you mention it, the ONLY thing I noticed when running through them after installing 4.0 is that the numbers in the boxes didn't the match stated defaults but they also weren't the old ones. Specifically, I know "Slide Pane Height" says Default=50, but there was "70" in the box. (I left it...looked good so...if it ain't broke...). Also, height was not the default or my previous setting, but "was in the neighborhood" , ~300.
Not sure what any of that means, other than, maybe there is a database table left behind after uninstall? and some detection (sort of) of prior settings. Anyway, I should've remembered that when giving my "report".
I'll be checking in on the forums with some frequency since I'm doing so much testing and I'll peek my head in here in case you've added anything else.