I followed the link provided in the Basics materials to download the exercises. However, when I try to open the zipped folder it tells me it's invalid. When I've tried to extract from it, I get a message saying it's empty. I downloaded it to a thumb drive and when I tried to open from there, a message told me to insert the last DVD. Obviously, there are no DVD's with the free Basics Training download. Does anyone have a different path I can follow to get the exercises? Or help in any way?