To begin, first make sure you have at least version 12.05 of Simple GIS Client installed on your machine. You can download the latest Simple GIS Client version here Simple GIS Client Download. If you do not have a valid license for Simple GIS Client, it is fully functional for 30 days after which time you will have to register Simple GIS Client by purchasing a license. Next, to download the GIS Server Admin Plugin, click the "Download GIS Server Admin Plugin" button located at the bottom of this page. Depending upon the browser you are using, you may be presented with different options as described below:
Once you run the GISServerAdminSetup.exe file and install the plugin, Simple GIS Client will automatically load the plugin when you begin a new project or load an existing project.