Click the Download for Windows link. The software will begin downloading on the lower-left section of your browser. Click on the file after download completes.
Software Installation Help - Chrome
Run installation. Once complete, click Finish.
You will be taken to this page after the installation is complete. Click on the Night Shift Launcher icon to open the application. Then click the Open ABMNSAppStarter button.
To start the software in the future, you just need to double click the icon on your desktop.