I and the artists where I work found your Sculptris software yesterday and were thoroughly impressed. We all said we'd dash home and install it privately and play with it all weekend, which I am sure they are doing right now.
I tried, but found errors when attempting to run the .exe file, which I put down to my OS being Win 7 64 bit.
I have found graphical errors with the CherryBrush package too; none of the type shows correctly, but displays as black rectangles. I was particularly sad at being thwarted in testing your drawing program, as I was eager to try the canvas rotation feature.
Would it be very cheeky of me to beg you to look at 64 bit compatibility after you get back from holiday?