MCU Functions Expanded in 7.5

Can someone please direct me to the right place. Here’s my question. Sorry for posting here.

Subject: VST
Description: I am working on a clients project. he is using Cubase 7.5.
I also am using Cubase 7.5
My Question is
Some of his VST plugins are not showing up in my VST such as
Halion Sonic Se
(Large Strings VX) and also (VX Bass).
Shouldn t I have Those in my Halion Sonic SE as well or is there a substitute ?