Peter,
Click on the start symbol then Computer then click on Hard Disk Drive OS (C)
On the left hand pane and you will see your name and below it App Data, click on App Data and it will open up the right hand pane and on it you will see Local, click on Local.
After you click on Local, scroll down the right hand pane and you will come to Virtual Store. Click on Virtual Store.
In the right hand pane you will now see Program files (x86) click on it.
In the right hand pane you will now see AirNav Systems, click on it and in the right hand pane you will now see AirNav Radarbox.
Click on Airnav RadarBox and you will see a folder Data, click on it and you should find the NavData.db3 file that you want and it should be around 50,438Kb in size. Left click on it and in the menu you will see Copy, click on it. The go to your desktop and left click and then Paste and you will see a copy on the Navdata.db3 file there.
Follow the same process to get to the old Navdata.db3 file and when you find it go back to your desktop, left click on your Navdat.db3 file you left there and past it into the folder containing the old one. A box will open up telling you that there is already a file with the sme name there and given a choice of what you want to do, click on the one Copy and Replace and the job should be done.
Start Radarbox and check if d/b explorer gives the correct total now
Alan