I wouldn't have asked if it were that clear. The order history identifies a SiteImport and SiteImport 2. One can just as easily interpret the latter as a ver. 2 upgrade by standard naming conventions for upgrades. Kind of like calling the first version of CSS MenuWriter CSS MW 1 and the second version (upgrade) just CSS MW. Confusing, but admittedly I should have been able to figure this out (and did).