Looking at the Swisstopo website it looks like the updater is for the software only, not the maps - have I understood that right? i.e. If I buy your 2005/6/7 versions and take whatever free updates, I still have 2005/6/7 maps, albeit with the latest software version to view them.
This is not negative, it's what I would expect - would be fantastic if got new maps as well but unlikely.