it's on header, in the profile (or i add it manually, don't remember)
To add it, just open header.tpl on digitalnature folder and find this:
PHP Code:
{else}
<li id="navprofile"><a href="{$URL_userNoVar}" class="main"><span>{#PLIGG_Visual_Profile#}</span></a>
<ul>
<li class="first"><a href="{$URL_userNoVar}">{$user_logged_in}</a></li>
<li class="last"><a href="profile.php">{#PLIGG_Visual_User_Profile_Modify#}</a></li>
<li class="last"><a href="{$URL_logout}">{#PLIGG_Visual_Logout#}</a></li>
</ul>
</li>
{/if}
I don't remember if i add the $URL_logout or if it was there, but with this
PHP Code:
<li class="last"><a href="{$URL_logout}">{#PLIGG_Visual_Logout#}</a></li>
you can logout with users.