as i work with the free version i can just keep it as sketchup files (skp) or google earth (.kmz) or export it as .jpg/.bmp/.tif/.png - as these are 2d formats that won't work. the pro version has the possibility to convert the files to several 3d formats, but that one costs 500 euro's.
i have design workshop on my computer too, but i can't  get the hang of that prog.

"The light at the end of the tunnel may be an oncoming train"