Cross DJ mac app store - how to upgrade to Cross full?

I bought Cross DJ from the mac app store and I wish to upgrade to Cross Full so that I can use timecode with vinyl.
Do i need to purchase Cross for the full price or can I go down the upgrade path?
Apologies if this has been answered elsewhere or is obvious to some, but I'm just slightly confused as to how to go about this?
Cheers
Do i need to purchase Cross for the full price or can I go down the upgrade path?
Apologies if this has been answered elsewhere or is obvious to some, but I'm just slightly confused as to how to go about this?
Cheers
