Acrobat Crashes on launch modal window with circle
I've been using Acrobat for years, but in the last day or so it's been crashing regularly with a modal window that comes up as shown below. After this window comes up, it will stay there permanently (had it running for over an hour yesterday in case it was updating or something).
It started slowly, at first just editing documents. Now it comes up every time I open Acrobat.
I tried uninstalling Acrobat, rebooting PC, reinstalling it. No difference.
Any ideas?
Windows 11 64-bit

