To run Family Orbit on your Windows or Mac computer you must download this specific version of Java (Java 8 / 1.8) on your computer and install it. It's easy and free.
Open below URL:
A web page like below will appear, read and agree to the license terms and then download the installer for macOS or Windows as per your platform.
Launch the program you just downloaded to install the software and then you are ready to install Family Orbit on your computer.