Turning off sets in 3D Invigorator Pro

Is it possible to turn sets on and off in Invigorator Pro?

I have a composition that calls for three different 3d models to turn off and on (only one model visible at any one time) and I can't work out how to do this other than perhaps putting in keyframes to change the position values of the models to move them off the visible screen when I want them to turn off!

Colin.