My Lumia 920 is currently running the Black firmware, with the Windows Phone 8.1 Developer Preview. Other Lumia 920 owners in the household, previously running 8.0 on Black, were able to upgrade to Cyan with 8.1 today. From online searching, it appears that the only current way for me to get Cyan is to use a Nokia tool to wipe the phone and restore it with 8.0.
However, I have some apps installed which appear to be currently removed from the Store. I would like to be able to re-install these apps after the wipe & update if at all possible. Is there a way that I can back up all of the apps installed on my phone (or, at least, the ones that didn't come bundled with the OS/firmware) and then manually re-install them later?