It sometimes happens that the GECAMed startup icon disappears from a user's desktop. There can be several reasons, such as a Java update, or by inadvertedly moving or deleting the icon. Here is a simple procedure how to restore it, using the Java Control Panel.
It is also possible that there is more than one GECAMed application installed in your Java cache. In this case it is best to delete them all, and reinstall the correct one with the Web Browser kaunch method.