You’re going to have to FTP into your site in order to get to the file that you need to modify. The file that you need to modify is located under wp-content/plugins/bbpress/bbp-themes/bbp-twentyten/bbpress which is one level lower than what you can access through the admin in WP.
Once you are inside the /bbpress directory explained above you’ll need to open loop-single-forum.php and follow the directions I posted in my first reply to you.
Unfortunately the plugin is only designed to work with bbPress 2.1 which currently is still in testing which is why it isn’t working for you. Was it working fine before the re-install today?
Which version of bbPress are you using? You can check by going into Plugins in the admin and it should give you the info.
No that’s how I do it within the browser. Are you using the bbPress Genesis Extend plugin?
Actually I should clarify that you should have your own theme made so when a new update is ready your changes won’t get overwritten. Assuming you have your own customized (child) theme look in there for the bbp_list_forums function and apply my above reply and it should work for you.
Go into your theme for bbPress and look for loop-single-forum.php. On line 24 you will see
<?php bbp_list_forums(); ?>
Modify that line to look like
<?php bbp_list_forums( array ( 'separator' => '<br />' ) ); ?>
