Oh, and to put it in the root directory, just move all the files from the bbpress folder into the root folder for your website. That assumes there is no other site in the root folder right now to conflict with. But if you just want a forum for your website, put everything in the root folder, not a folder called bbpress.
I’m not sure what else has to happen for you to make that move now. Since you don’t have too much going on there yet, you might want to just reinstall it in the root folder.