I did contact the vendor. Her reply, which was not included in the Product Page or the Read Me, was that I'm supposed to make V4's feet and toes invisible (no pose for this was included). Nothing like shifting responsibility to the buyer when the seller can't figure out something during creation.

This solution stinks because once you make a body part invisible, you can't click on it to select it for posing. You have to select from a menu, which in the case of feet and toes means scrolling to the very bottom.