Follow these steps to start using Shape2Earth for MapWindow GIS:
1. Download and install the free version of Google Earth.
2. Download and install the free and open source MapWindow GIS.
3. Directly install Shape2Earth.
4. If you do not see Shape2Earth in the MapWindow menu, click on Plug-ins menu and select Shape2Earth.
5. Load a Shapefile into MapWindow, set its symbology, and click "Export to KML" under the Shape2Earth menu.
6. Test Shape2Earth on your data. If you would like to purchase, you may do so by selecting 'Register' under the Shape2Earth menu.