first, close your cc desktop app.
then, rename the opm.db file by:
navigate to the OOBE folder.
Windows: [System drive]:\Users\[username]\AppData\Local\Adobe\OOBE
Mac OS: /User/<username>/Library/Application Support/Adobe/OOBE folder
and rename the opm.db file to opm_old.db, eg
finally, launch your cc desktop app.
Thank for the reply. I ended up reinstalling CC App only. It's now fixed.
I will keep this for the next time this may happen