I would recommend emailing lnicula@eeye.com and bpatten@eeye.com with your request. Be sure to include your order # and any other information from your original purchase in your email. They should be able to assist you. If you do successfully upgrade your order, please be sure to read this post concerning your licenses (to save yourself from troubles).
http://forums.eeye.com/forums/t/946.aspx