Edditing gpsilvor.db - impossible for user. Only me can do it

Just joking - is very difficult to do it, beecause there are several tables which are connected by dynamic created keys, so editting is possible only via FLY is FUN...
But you have a lot of possibilities for importing external files (try user guide version 10.4, there is support fot GPX, KLM and text file). I tried to import campiArf+aerop130131c.gpx, and it works... Copy file to Android device, run FLY is FUN, open nav item list, create new folder, open this folder, press Menu / Import and find the file.
Look here
viewtopic.php?f=6&t=5395 (it is from user guide)
I prepared italian airport text file (using Word and Excel). Try to import it (unzip first).