Try to purchase the upgrade and see if it will go through.

I'd upgrade but at this point it is cheaper for me to upgrade Shade and I am really considering do it.

The problem is deciding which app to continue updating.  Right now I have MotionBuilder, XSI Essentials, and Cinema 4D XL which are now a few versions behind as I never wanted to $pend the cash they were asking.  Keeping current are Modo, Lightwave, Silo, SketchUp Pro, and Life Forms.