Come to think of it, no one should be able to sell it in any fashion, given that all the known builds use the Prof-UIS lib. Might check with Ashley, but as I recall even the freeware version is for non commercial use only, and I dont think they were using that one.
Also even if they did have a legit license from Prof-UIS, and made their own build, they could be in trouble if they used Visual Express. As I recall that's for non commercial use only as well.