The PC/Notebook/Netbook, the RB Software was running on, had an internet connection? And: do you have tracked D-AIMA before? If not there is a good chance, that she isn't in your Navdata Database jet. And without an Internet connection it is impossible for the RB software to lookup the new received ICAO address of D-AIMA and fill in the missing information.
But you can manually fill the Database:
Use File -> Database Explorer
At "Select Table" go to Aircraft.
Tick "Add Record"
Fill in:
MS: 3C65A1
AR: D-AIMA
AT: A388
AN: Airbus A380-841
AC: Lufthansa
CN: 038
With a working Internet connection it should be enough, if you add the first two on the list. The rest will be filled automatically, if "Auto populate Aircraft Data" is ticked "ON" in the "Preferences" Menu.