I look at it very simply - Prepar3d is sold for educational purposes.
It says on it's website that you do not need to use it in a structured setting, and in fact that you can use it in your home.
If you bought it, could you learn anything?
Me? I've loved navigation ever sense I was a Boy Scout walking through the woods.
I'm too old to ever get any kind of a license, but I can still learn navigation. Just don't tell LM that I enjoy learning.