I am having some trouble importing dwg. files to TBC. I tried drag and drop, and the import menu, but it says unable to open file. It does the same thing for dxf. files. I can import kmz. file but the drawing comes up in the wrong location and the map is rotated wrong. I'm still on the 30 day demo, does that have something to do with it? Or why would it not accept dwg files.