All, please keep this on topic for the original poster. I left it open for a reply to my last post to pipeorgan. Also, as Tom notes here and in other posts, if you bought any add-on through the in-game Marketplace, that's where you'll have to go for updates.
Yes. Stuff you have bought from Microsoft is also getting updated from Microsoft.
Stuff you have bought from the Aerosoft shop or any other online shop like e.g. SimMarket (meaning: not the in-game marketplace) is getting updated via AS Updater.
Updates will be made available to Microsoft the moment they are getting released also in the AS Updater. It is up to Microsoft to make them available in the Content Manager, and totally out of the hands of Aerosoft.