includes/config.inc.php

search for 'SEARCH_FRIENDLY_URLS' => '1',

change the 1 to a 0

search for 'SEARCH_FRIENDLY_HTML_EXT' => '1',

change 1 to a 0 (it might already be a 0)

or... you can go to http://yoursite.com/forums/admin (assumes your forums are in the 'forums' directory), login and edit things.

the admin cpanel doesn't get involved with spider friendlies, so it can be manually just URL'd to smile