Gabrielle,
You have the update in the 2009 folder but 3.13 uses the other one.
Move the Navdata.Db3 file from the 2009/Data folder to AirNav Systems/AirNavRadarbox/data folder and it should be OK. Once installed statrt Radarbox again, open up d/b explorer and you should have 176,*** aircraft.
When you do any future updates install them to H/programmi/AirNav Systems/AirNavRadarbox. Dont go any further the installer will put it in the data folder.
I would then delete the 2009 version as it isnt being used and causes confusion with the newer version.
Alan