The window didn't close, I didn't even hear a tab closing sound (which i have on). I have 1 window with many workspaces (some of them were hidden at the time, same thing happened to them) and I was typing something in the searchbar and everything just vanished. I used Ctrl Shift T a bit, which remembered recently closed tabs, but didn't reopen the ones that just were closed. I have the setting on which remembers tabs/windows after closing opera, but reopening it didn't bring them back. Lots of the tabs were pretty important. How do I get them back?