For Windows -
In My Computer, open the DVD drive by clicking on it, then double click ATSOCAS.exe.
It's incredibly fragmented and difficult to find simple info about what should be simple things. I gave up and hunted around the net but only found the same thing online. It would help enormously if they stopped trying to be clever in an area in whcih they obviously have no expertise (multimedia), and wrote a straightforward simple guide for the GA pilot. I expect all the magazines have it sensibly decoded, but I haven't checked.
Bernie