Well, I am confused but if I go to C:/programfiles(x86)/airnavsystems/airnavradarbox/data I can see as you said, folders for Assets, Flags, Logo and silhouettes. Down the list I find navdata.db3. I have just downloaded it again from the Airnav website and it is 44mb but when I open Airnav and look in Database Explorer it shows 80401 aircraft. There is another Folder in this Data file, again named Data. If I open that one, I find NavdataDB3Creator.
Clear as mud! I do appreciate your help here Alan by the way, dont give up on me just yet!!