I did the same thing back then that I did last week when kernel 16 blew up. I did my super fast reinstall. I always use a dev version and I always keep an updated installer handy.
On the other hand, its been a long time since 11.04 or later when I used a Unity desktop but looking back I guess I could have just clicked the reset link but looking back I admit I didn't know it existed. Must be a Unity 20.04 thing. I'm on Gnome 40 so just don't know.
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