I was just playing with the Demo -- one can only play with the settings, but cannot place an actual stair, is this true? Very nice interface -- superior to StairBuilder I must say.

I have a suggestion:

It would be great to have a preview window as part of the dialog, so that one could get an idea of the stair prior to placing. I realize that one can edit the stair once it is placed, but for those of us using the Demo, we really have no idea of the final product. It's hard to invest US$140.00 in something, just to see if it works for you (learned that lesson with StairBuilder).

Good idea that one regarding the stair preview.
We are going to implement it in the next major update.