The greyed-out button isn't a glitch; it is Adobe's software aging out. Use the command line method to rescue your license one last time, then back up your data and let it go.
Corrupted installation files can lead to a partially functioning program where the licensing files are damaged. Running a repair can rewrite the necessary registry keys and files. adobe acrobat xi pro deactivate greyed out
Upon restart, the software forces a re-initialization of the licensing subsystem. In many cases, the "Deactivate" option under the Help menu will suddenly turn black and clickable again. The greyed-out button isn't a glitch; it is
When you launch Acrobat XI Pro after this step, it will act like a fresh install, asking for your serial number. Once you enter it and activate it successfully, the "Deactivate" button will function correctly. Running a repair can rewrite the necessary registry
After doing this, you must sign out of your Adobe account within Acrobat (if you are signed in) and sign back in to re-sync the license.