There is something broken with this and also 2.78 on my machine. I am a licensed user and when it's selected from Mach, the initial screen shows up, but the buttons that allow you to get past that first screen aren't visible, so I can't do anything with any of the wizards. It did work ok with 2.76 I believe. I am running the latest version of Mach and NFW were installed after upgrading Mach.
Thanks.