I am pretty sure that the company is intent on keeping its security-system secret, possibly even a trade-secret as it protects their product. And from your post, I judge that it does a good job of it to. Obviously it doesn't need anything off of the HDD since you did format it, and you should realize that even 3DS Max wouldn't waste their time developing code to scan entire HDDs for hidden/erased data just to protect their product. Since they did contact you directly for the demo, it is possible that they customized one especially for you. They obviously know you. They're watching you. You cannot escape. <EVIL_LAUGH>


Anyways you'll have nothing to worry about after purchasing it from them. And if you decided that you didn't like the software, you can just delete it and forget about it. Your computer won't decide to mysterously quit working either way.

Personally, I go for OpenSource 3D Modeling programs. My favorite is called OpenFX, although everyone I know says that Blender 3D is good and that my favorite modeler/render sucks... I can't get a feel for Blender, so OpenFX isn't bad I guess. Anyways, there is quite a bit to choose from, and there is no harm in looking at other software to see if it meets your needs better or fits your budget easier.