I have to update some drawings right now, now these drawings were made in different times, i.e 2007/2009/2010 and such, when I try to update the materials inside the cutlist it doesn't let me do it. Who made the drawings wrote down the properties of the materials instead of link these to the actual material that the body is made of. When I try to delete it (so I can select the materials option from the dropdown menu) nothings happens. How can I solve this? Any suggestion?