@kmara An hour ago the update button popped up. I had dozens of tabs and tab islands in 4 windows. Never had a problem with updating on the fly previously. So, accepted the update which always happens quickly. As the users above commented, Everything is gone. It's like installing Opera for the very first time.

My question: When you say "roll back" do you mean I should completely Uninstall 102.0.4880.29, download Opera_101.0.4843.58_Setup (in my case) from the list you provided, once it's installed, finish the steps you provided?

What I tried first: Didn't uninstall 102.0.4880.29, D/L'd Opera_101.0.4843.58_Setup, installed it. What Opera did: it immediately updated the 101 install to yesterday's 102 update. Ended up right back where I started from... a newbie install, completely virgin.