Hello,
Could you please try following steps:
Browse to c:\ProgramData\Adobe\SLStore
Set your settings to view hidden files and folders. If you see any .LIC files in there, rename them (prior to deleting them).
Then relaunch Adobe and see if it works!
If it works, then go back to that folder and you should see a newly generated .LIC file. Delete the older files and you should be good!
Regards,
Anoop