Re: “Already Installed.”
This happened to me as well during one of my many installs of BBpress. Make sure that you installed it from the correct directory from the start. For instance, mine was sitename/wp/bb and I installed it from sitename/bb. It worked, but it looked like that. Also, if you selected true in the permalinks section in your config, make sure you have the htaccess file in there. That should remedy the redirect problem…
Hope this helps….