The ability to save to earlier versions of SketchUp was removed a while ago. There is extension support working for now.
Back to SU21 is all the same file type, no need to backsave. 20 and earlier need the extension.
The ability to save to earlier versions of SketchUp was removed a while ago. There is extension support working for now.
Back to SU21 is all the same file type, no need to backsave. 20 and earlier need the extension.