To launch the ground control program from the no install download, download the zip file (if you haven't already, it is available here), unzip it to a convenient location on your computer and double click on the file GroundControl within the folder. The other files in the folder are important and must not be deleted or moved. You can create a shortcut to the GroundControl file if you would like to be able to launch it from somewhere else (for example, the desktop).