The Download Type Selector and button in the Shapes Tab in the Vector Tools Panel in the Side Panel can be used to download all of the features currently in the Shapes Layer in either KML or GeoJSON formats.
Both download formats can be used in many other geoprocessing applications.
To download simply select either KML or GeoJSON in the Download Type Selector, and then click the Download button in the Shapes Tab.
Downloaded files can simply be dragged and dropped anywhere over the map window to reload the doanloaded features at a later time.