I found this and followed these steps. One key point was in the new brave-browser to import your settings from “Brave(old)”. However, it does not seem like passwords came across.
I do have my summary stats, but lost all my sites I had queued up for BAT when the next date came. That’s reset.
IMO, this upgrade should have been handled via Ubuntu. I now have ‘brave’ (0.25.2) and ‘brave-browser’ (0.57.18)