Starting the viewer
The Windows installer provides a menu item for the application. Just look through the START menu, it should be there...
Linux users will be starting the wpclipper.py script. Most of us know how to make shortcuts quite easily . . . If wpclipper does not start or run correctly, try starting it from an xterm to see the output. Change to the viewer directory:
cd /path/to/wpclipart/viewer ./wpclipper.py