The app exits fine. It's *after* exiting that one notices the main Roku menu is gone. Vanished. Great magic trick. FWIW, it is still there, it is just not displaying. My Channels, Setup etc are still functional too, just the words, "My Channels", "Setup" etc are missing. [Edit: They are: My Channels, Movies, TV Shows, News, Search, Channel Store, Settings but, c'mon. Setup <--> Settings. I was so close!]
AFAICT, this is due to the missing "<roScreen> = Invalid".
Also, this may be a Roku 2 XS ( 3100X, SW ver 5.5 * build 410 ) issue.
peace & 42