You can install KerbalEdu through TeacherGaming App (https://app.teachergaming.com). Please note that you will need to download the app to your computer in order to install the game.
After you have the App on one computer and have installed KerbalEdu there you can copy the whole App folder to any other computer you wish to use the game on. The game does not have to be installed again on the other devices - it is enough to copy and transfer the folder from the original computer (where the download and installation was made) and the game will work instantly.
For more information on how to download, install and run the game please read our blog post https://store.teachergaming.com/blog/kerbaledu-has-been-updated-n45.
You can always get in touch with us if you run into any issues!