no idea, I don't have the money to upgrade and I haven't bothered with the demo either. SOrry mate.
Oh, that's fine! I finished the artwork, actually, you can check out my final piece on my page 
How did you find my tutorial anywhoo? this tutorial is like, beyond ancient. XD
Probably Google search... I was looking for a good diamond tutorial because the one I found first, didn't quite have good enough directions. So I really thank you for putting up this one! 