The "master control" is the circle around his feet. All the other controls (including the facial expression sliders) as well as the character's joints are parented to this master controller.

This master controller allows me to move and scale the character regardless of which scene he is imported into. Everything else moves and scales in proportion.

Perhaps this is your problem! If so, it is a relatively easy fix. If not, post a picture like the one I did and let's see if we can't all figure it out!

Regards!