Hello Nigel!
I hope you are doing well, and we apologize for the trouble you had.
Have you tried the suggestions shared by our community expert? We verified the Adobe ID (email) which you used to sign in to the community and see that you have an active subscription to Acrobat Pro. Please ensure that you have the latest version of Acrobat Pro 25.001.20458. Planned update, Apr 15, 2025. Check for any pending updates from the Menu > help > check for updates, install the updates, restart the app and the machine, and use any tool. For the latest build, see this article: https://adobe.ly/4iq758i
After signing out of Acrobat, reboot the machine. Launch Acrobat and sign in with your Adobe ID (email). You may also try the suggestions from this article: https://adobe.ly/4jBk1sN
If the issue persists, please use the Acrobat Cleaner tool to uninstall it completely, reboot the machine, and install Acrobat.
Let us know how it goes.
Thanks,
Anand Sri.