The free EZX offer is for when you purchase the Regular version of EZD2 and not the Upgrade version. The Pop/Rock EZX is the original kit from EZD1. It is automatically wired to any qualified account when the EZD2 Upgrade is purchased. See the FAQ below regarding the Pop/Rock EZX.
http://www.toontrack.com/faq/w.....y-account/