Brisbane,
I know what you mean by frustration!! the 12 hours or so between question and reply doesnt help either.
You must have a Navdata somewhere on the computer or else you wouldnt get any registrations etc shown on your screen and wouldnt have 88,000 frames. Be very careful what you delete when you are unsure of your ways around a computer.
It would help if you could tell me the location of Airnav on your computer i.e. C:\Programe Files\Airnav Systems\Radarbox, if you have installed to the default this will be the case and i use this assumption when giving the advice.
If you have run the update the new Navdata must be somewhere on the computer, but again if you have used the default with the Navdata installer it would have sent the updated Navadata to the program files location and. Carry out a search again for NavData.db3, using solely that statement. This will show you all occurances with that in the name in your computer. There should be a few different ones but you must remember that it is only Navdata.db3 you are interested in, nothing else with any further additions. This Navdata.db3 should be dated with the install date which I presume is yesterdays date and will be around 27,000KB in size.
You will need to move the updated Navdata.db3 from wherever you have installed it to on the computer, to the correct place which if you have installed Radarbox to the default location should be c:\Program Files\AirnavSystems\AirNav Radarbox\Data. Moving it into the correct location will mean that you will be asked if you are sure you want to do this, answer yes.
Re-start and hopefully it will work.
Alan