[Opserty]

EDIT: Actually you can just edit the template (USERCP_SHELL)

OR if you don't want to edit templates, then add a Plugin that uses the usercp_complete with the following PHP code:

PHP Code:

$template_hook['usercp_navbar_bottom'] = 
'<tr>
    <td class="altX" nowrap="nowrap"><a class="smallfont" href="YOUR URL">YOUR LINK</a></td>
</tr>'; 


(You need to change altX to either alt1 or alt2 which ever matches)