Cubase Cubase 6 upgrade

Steinberg Cubase 6 upgrade from Cubase SX1/2/3, Cubase SL1/2/3, Cubase Essential 4 and 5, Cubase AI4, AI5, Cubase LE4, LE5 Cubase SE3, Studio Case 2, Sequel 1 and Sequel 2. (License Method: Steinberg Key - not included - use Steinberg Key supplied with previous version of Cubase or purchase a blank Steinberg key separately. The existing SeL number for Cubase LE4, AI4, LE5, AI5 and Sequel 1 and 2 must be transferred to a Steinberg key before the upgrade can be installed.)