My computer recently totally crashed after some Windows update and I had to reinstall all my old software. I got the new Autodesk Netfabb 8.1. It works for fixing meshes and things like that. But for the life of me I can't figure out how to use it to measure wall thicknesses and things like that. There is no icon for it anywhere on any menu that I can find. Am I missing something? Is this part of the premium version?