Sign out chrome causes the lost of extension and db files?

I lost all my 3000 tabs in signing out/in several times. I tried everything mentioned to apply my html backup and it didn't work. The drag & drop of tree from the file to the extension doesn't work and show <meta... I tried as well to copy old indexedDb from a backup but it's override when I reinstall the app. Is the extension down/not sync with current versions of chrome ?