Tried to download Instruments Pro (and afterwords Mir : same problem).
After adding it to the car, at check out time , I get the message : please add a product to your cart, and you're back to where you started.
So, basically, you can`t get the demo.
(I remember downloading a VEPro5 demo succesfully in the past, so maybe it's related to the products, or to the fact I now am a - logged-in - customer ???)
FYI : downloading files in the user area is no problem