The toolbox is available only for the Windows operating system. I've installed it successfully on Windows 10 and tested the program successfully on Mac OS High Sierra with the help of Wine Bottler. Wine Bottler makes it easy to install and run Windows apps while you are on a Macbook or iMac running latest versions of the OSX.
Therefore, download SNC Toolbox and the WineBottler app. Install it on Mac, and follow the procedure to launch the Windows app.