I downloaded the demo, too, to see what the fuss was all about.
Couple of questions: what is with the yellow box in mid-screen with the right and left handed mouse buttons? No amount of clicking and selecting will make that go away. I can work "around it" but it is annoying. Is it not recognising the mouse hardware somehow?
Is there some trick to make the program import igs files or is this crippled in the demo? I was half expecting an option dialog to pop up with a selection of ways in which I might want it imported. It just does nothing right now.
Tell a newb how to select something to rotate it dynamically? I always seem to get caught up in some kind of thing that wants me to pick the pieces I want to rotate, and even then it does not seem to work. I just want to look at the binoculars thing from various angles