Figured it out. For some reason this code in functions.inc was commented out:
Text Formatted Code
function plugin_getmenuitems_filemgmt()
{
global $_CONF, $LANG_FILEMGMT;
$menuitems = array();
$menuitems["{$LANG_FILEMGMT['downloads']}"] = $_CONF['site_url'] . "/filemgmt/index.php";
return $menuitems;
}
I've never dealt with that file before, so it would seem it was commented out from the start. I just don't see that being the case though, so I'm not stressing about it.