Hi John,
In the Mach3 folder is a file Mach3Mill.xml which contains all the settings for that profile. If your new machine software runs a different profile (name shown bottom right of Mach screen) then you need to save that .xml file somewhere as a backup for all your settings (I perhaps doesn't hurt to print them out as well, just in case).
Despite it's initial daunting appearance Mach is not hard to learn to use and I have always advocated only learning what you need to know (I have been using Mach for a couple of years now, I only know the half of it, if that, but I get by). Get plenty of hands on experience and look up stuff only when you need to know it is my approach.
I think that once you get hands on it will soon all fall into place and there will be loads more products on your website.

Tweakie.