Mixvibes DVS 7 to Mixvibes Cross 1.7 Upgrade

Hi.
I have Mixvibes DVS 7, i want know if can do the upgrade to Cross 1.7, or must buy the complete software ?? Now i use a Mac.
Thanks!!
I have Mixvibes DVS 7, i want know if can do the upgrade to Cross 1.7, or must buy the complete software ?? Now i use a Mac.
Thanks!!
