Back in the good old days I bought the German Airports 3 X - a bundle of EDDW, EDDH and other airports. Even today GA3 X can be bought as a bundle for FSX (and FS9), but you can also buy the individual airports separately as GA3 Hamburg or GA3 Bremen. The price for the bundle is naturally higher than for the individual ones - but this is only to be expected.
What I did not expect was that an upgrade to Hamburg Pro for use with P3Dv4 is ONLY available if you bought the individual airports like GA3 - EDDH, not when you bought GA3X.
Apparently Aerosoft regards the German Airports 3 2012 X (the bundled version) as a different version of German Airports 3 2012 EDDH (or EDDW etc). The result is that a supporter of Aerosoft buying more scenery (EDDH+EDDW+..) in a bundle is worse off, when an upgrade is offered to the customers.
The morale is - do not buy bundled versions. You'll have a hard time figuring out, when an upgrade offer is available to you or not. (or you can try to find an other company offering a better service).
A desillutioned customer - Torben Andersen