Preproduction CDs were sent out for testing before the software was finished. There is no reason to use a preproduction version of the software. It will be full of bugs and incompatabilities. Just get PTC to send you the latest version. ProEpro
I would guess that the question is being asked because someone actually got CD's from the Russian backup archives!
Ben Loosli
CAD/CAM System Analyst
Ingersoll-Rand