To install the ground control program, download the installer file (if you haven't already, it is available here) and double click on it. If you launch the program directly from your downloads you may see a security warning similar to this:
This security warning is normal and you should click "Run" to launch the installer.
This will launch the installer which will look like this:
Click "Next" to proceed.
Next you will be prompted to choose an install location.
Click "Next" to proceed and you have the option to change the installation folder name.
You will then be given the option to create a desktop icon if you want.
Click "Next" to to review your choices.
Click "Install" to begin the installation.
Finally you will be given the option to finish the installer.
You will now be able to launch the ground control program from the start menu or the desktop.