Ok go into your AdminCP and go into the Language & Phrases and then search for
copyright. Then since you deleted everything, paste this into the blank box:
Code:
<P ALIGN="LEFT">Powered by <a href="http://www.vbulletin.com" id="vbulletinlink">vBulletin™</a> Version {1} <br />Copyright © {2} vBulletin Solutions, Inc. All rights reserved.</P>
and then save it and it should already be aligned to the left.