Hi guys,
I've been annoyed by this a few times now, and now's the time to make a post about it :-)
When entering the APPS section and entering an app i.e. the new Data Portability app (doesn't matter which app), you have no obvious exit = "back to apps list" button – to get back and pick another app you need to refresh your browser and click on the APPS button again... Bad UI = Bad UX.
So some kind of "back thingy" is needed.