[chrishajer]

If you want to reinstall, you also need to remove the database tables, in addition to bb-config.php.

You can also edit your bb-config.php and add a line like this to override the configuration:

$bb->uri = 'http://klikerlab.pl/forum/';

Help! I renamed my bbpress file directory name…

You have to rename the folder where you installed bbPress as well, from bbpress to forums. You can’t just make the configuration changes.