Hmm... well it's not simply "vanishing" anymore, but it is locking up, sort of like 1.4 was. It locks up right when it tries to change the banner the first time.
Unfortunately, I can't downgrade back to 1.4 since I upgraded hoping to fix bugs (XoloX crashing all the time).
Edit: scratch that, it locks up whenever ANYTHING on screen (in the program) changes, including trying to use the menu to get to the Preferences.
Edit: Hmm, this is interesting. If I jump straight to Transfers right when XoloX opens it will actually go for about 3 minutes downloading files successfully. It will lock up after a few banners load though, or if you try to do anything (including minimize or close the window).
You can tell I've got a lot to do at work, eh?