If you wish to place the Last Activity Date in the Postbit Popup Menu, instead, import the attached XML file as a plugin.
The following code should be added to both postbit and postbit_legacy templates:
Search template for
$template_hook[postbit_user_popup]. Immediately
above that line insert:
Code:
<!-- Show Last Activity Date -->
<tr><td class="vbmenu_option">$vbphrase[last_activity]: $post[lastactivitydate]</td></tr>
<!-- End Show Last Activity Date -->
Now save it. Refresh your browser (F5). The result should look like the screenshot in the attached image.