I’m on Win 7 as well and had the same issue.
Backup this directory which contains all your extensions(and configurations) and profile - Tor Browser/Browser/TorBrowser/Data/Browser
Delete your base “Tor Browser” directory.
Download and install the fixed 13.0.8 version from - https://dist.torproject.org/torbrowser/13.0.8/tor-browser-windows-x86_64-portable-13.0.8.exe
Merge the Browser folder that you backed up into the new Tor Browser/Browser/TorBrowser/Data/
Everything will work again.
Cheers!
PS: It’s unlikely that I will be upgrading to Windows 10/11 . I’m gonna be on the lookout for Firefox ESR forks that will work on Windows 7, whose signature I may then modify to make it look like the official Tor Browser. And have it connect to the tor network using tor-expert-bundle.
Now if tor-expert-bundle stops working on Win 7, that’s when we’re doomed.