So you should be able to use the desktop version to export. It has a different UI, so it would be at a different spot:
File->Export->3D Model then select the right format:
FWIW. Usually, one goes from Revit to SketchUp. what is it that you want to use in Revit. From what I have read her on the forum, SketchUp plays well with other software, but the other software doesn’t like SketchUp evenly…