3 Replies Latest reply on Apr 22, 2012 11:48 PM by Pogo007

    Upgrade CS4 to CS5 with invalid serial number from pc to mac


      I bought CS4 from a registered reseller a while ago, but now when I try to register the download, it says the serial number is invalid. I am now unable to reach the reseller. I have recently moved from pc to mac and would like to purchse CS5. Is it worth trying to register the CS4 so I can qualify for the reduced rate to upgrade to CS5? Or does the change from pc to mac mean I need to purchase new software entirely and pay the full rate?