This has been an interesting experience. Tried to update a Creative Cloud app (Audition in this case). Received error code 105. Checked hdpim.db per these instructions. Yep, data store was corrupted. Finally able to use option 3 (after unable to successfully complete either of first two options). Of course, since now starting with a new data store, I have to install all the Creative Cloud apps again. Still puzzled how original data store became corrupted.