My painter essentials 7 doesn't any erasers other than the base tool

I got painter essentials 7 from a Wacom key but was confused when confronted with the fact that I only had a eraser thats setting couldn't change. So I looked up how to change it. Not only did I find out you can't change the settings but there's a whole column of erased brushes that I don't seem to have. Can some one please help?