read this:
The automated data exchange between ArchiCAD 15 64-bit edition and Google Earth, Google Warehouse and SketchUp is not available due to technical limitations. Read more about the suggested manual communication workflow below:
www.graphisoft.com/products/archicad/addons/google_earth/ge_earth_connections_workflow.html
So instead of not creating the add-on at all, Graphisoft made the Sketch-up import and supplied a work around.