It might be there but it will take too long to go through 20 pages of suggestions.
There should be two NavData databases. The Master and your personal one. The Master comes from AirNav and when we get an update it can just be overwritten by the new one. Your personal database is for aircraft you add.
Why two? That will solve the issue where you might have local issues, eg aircraft that fly around locally with the wrong mode S, etc. Also you might have just recently added and aircraft and then an update comes and overwrites that one. The system will look at the local database first and if the Mode S is not there - pull it from the master for display. Of course there will be nice little utilities that allow you to compare the two and make send info to AirNav if it is missing on the master , delete duplicates off the local, etc.