@leocg Using opera GX. How do I back up the content of the session folder? No I don't think they were in the tabs menu

I had all of my important tabs open and I keep my tabs up that are important and search other things while I have them open. Once I restarted my computer all of my tabs were gone from Opera once I started the browser up again. I tried looking through my history to find my tabs I'd kept open but they were scatted through my history. Ctrl + alt + t'ing doesn't work since it brings up my recently searched. Is there a way to get all what I had open back at once? Sorry if this is just a stupid mistake...