Hi.
I got a sketchup model from a customer. I installed Sketchup 2015 in order to open it. I still have Dietrichs 7.04. It can be that the sketchup model is just not very good. I tried to make a horizontal section in 1st and 2nd floor and export to dwg, so I could have something to work from. I was also thinking about exporting the whole sketchup model to Dietrichs 3D, but I am not sure if that would work.
So maybe the two dwg floor plan sketches is the best I can get out of it, to have something to work from??