Hi CS Addict,
Could you move the current copy of this file to the desktop and see if it solves the issue. The file is opm.db
- On Windows the opm.db file is located here: C:\Users\<user>\AppData\Local\Adobe\OOBE
- On Mac the opm.db file is located here: <user>\Library\Application Support\Adobe\OOBE
Close Adobe Application Manager and Creative Cloud Connection
Move that file to the desktop
Relaunch Adobe Application Manager and Cloud Sync and sign-in and try again
-Dave