Re: No search… how to uninstall
You can search here: https://bbpress.org/forums/search.php
(I have no idea why there isn’t a link to that page from the main page, or even in the main bbPress theme, but that’s a different topic altogether.
As far as I understand, to uninstall and re-install you’d only have to drop the tables from the database. Unless you changed the template files or something, I don’t think you’d need to delete any of the files.