This might work. In the postbit template scroll down about 60% and modify the red conditional
<vb:if condition="$show['postedited']">
<!-- edit note -->
<blockquote class="postcontent lastedited">
<vb:if condition="$show['postedithistory']">
{vb:rawphrase last_edited_link_by_x_on_y_at_z_postid, {vb:raw post.edit_username}, {vb:raw post.edit_date},
{vb:raw post.edit_time}, {vb:raw post.historyurl}}
<vb:else />
{vb:rawphrase last_edited_by_x_on_y_at_z, {vb:raw post.edit_username}, {vb:raw post.edit_date}, {vb:raw post.edit_time}}
</vb:if>
<vb:if condition="$post['edit_reason']">
<span class="reason">{vb:rawphrase reason}:</span> {vb:raw post.edit_reason}
</vb:if>
</blockquote>
<!-- / edit note -->
</vb:if>
{vb:raw template_hook.postbit_signature_start}
<vb:if condition="$post['isfirstshown']">
{vb:raw ad_location.ad_showthread_firstpost_sig}
</vb:if>
<vb:if condition="$post['signature'] AND THIS_SCRIPT != 'private'">
<blockquote class="signature restore"><div class="signaturecontainer">{vb:raw post.signature}</div></blockquote>
</vb:if>
{vb:raw template_hook.postbit_signature_end}