This was bugging me a lot and I did not find a way to do this. Fortunately using Search I came up with this answer on a blog . It may be a way to encourage more people to download the toolbar. Well if you like StumbleUpon I guess you have to live with it. Did not see support for Opera and Chrome yet.
Good luck remembering your original password :)
Strategic Engagement
Disclaimer: This blog reflects my personal views only. AI tools may have been used for research support. This content does not represent the views of my employer, Info-Tech Research Group.