Actually let me clarify that- you need to install all the upgrades in order- starting with the early ones first, install thse, and then the newer ones. This applies to me more than to you, however, since you will be installing the current version, not a version from 2004, as I have. My recollection of them is that once you buy the progrqam, and 'you're in' they are very easy about letting you upgrade and letting you add newer models, flying fields etc.