I got this e-mail. I don't know it will work for you but it is worth a try. It is cheaper then upgrading.
Dear Amazon.com Customer,
Customers who have shown an interest in photo- and video-editing software at Amazon.com might like to know about this offer exclusive to Adobe Elements and Lightroom customers:
Now through August 30, 2012, use code KNAH-NT4HU3-VY742K to save an additional $400 on Adobe Photoshop CS6 or Adobe Photoshop CS6 Mac. Simply enter the code at checkout to see savings. Limit one redemption per customer, valid on products sold by Amazon.com, while supplies last.