Sure. Both Mac and Windows failed.
My version is 6.1.1 (both Mac and Windows).
Thanks for the information.
It looks like Lightroom thinks you have registered outside US.
Reset Lightroom Preferences
First Backup your catalog
Then Press and Hold down Command+option+shift(MAC)/Control+Alt+Shift while starting Lightroom
If the Problem is not solved.
Close all Adobe Programs,(Sign out of Creative Cloud and quit it if open)
On MAC Use the Finder to navigate to Library/Application Support/Adobe/SLStore.
and Rename it to Slstore.old
Also rename Slcache to Slcache.old
On Windows navigate to ProgramData\Adobe\SLStore (Program data is hidden Folder)
and rename it to Slstore.old
Also navigate to C:\Program Files (x86)\Common Files\Adobe\SLCache and rename Slcache to Slcache.old
A link you may refer to rename these folders Lightroom doesn't launch or closes automatically after splash screen
Open Lightroom and see if it works now
I press Command+option+shift when starting LR on Mac, but nothing happened. No yes or no choice.
I also deregister, close LR and rename the folders. Then open LR and register again. It still does not work.