"uninstall" is greyed out - we cannot uninstall: that's the problem! :-( If you managed it better hope your computer doesn't auto-update you with an undeletable version. I still can't do my work to the standard I previously could, using the original Edge as an editor of PDFs.
I couldn't figure out how to uninstall the update either so I stopped using Microsoft Edge altogether and went back to my old browser which is working fine for what I needed to do. I understand that they updated it because licenses will be terminated for Adobe Flash at the end of 2020 BUT that's almost a half year from now!! They should have eased folks into the transition instead of forcing users to do it right now or else. They will lose a lot of users now. Shameful.