una/modules/boonex/acl/template/pm_actions.html

<p class="acl-dbd-membership-actions mt-2 text-center">
    <a class="bx-btn bx-btn-small" href="__url_upgrade__"><bx_text:_bx_acl_txt_upgrade /></a>
    <!--
	TODO: A link to our own Manage tool or some manager from Payment Provider should be here.   
	<a class="bx-btn bx-btn-small" href="javascript:void(0)"><bx_text:_bx_acl_txt_manage /></a>
	-->
</p>