[Dx4win] Missing Country.dat file

[vk3io]

Hello DX4WIN Users.

I have been using the latest version DX4WIN, now version 9.0.9.1259 for 
the past two years, running on Window 10, without any issues.

Yesterday, on start-up I got a "Fatel Error Message" saying Country.dat 
file was missing and error message said I had to close the program. It 
would not run

I found a Country.dat file, which was not too old, in my latest Back Up 
folder and copied it into the saved folder and all was well again.

I checked for the latest Updates and downloaded the latest Country.dat 
file, to be sure I had the latest version of Country.dat.

My question, is how did my original Country.dat file go missing?

I have not been accessing or doing any work on my DX4WIN files.

It was not re-named or moved to the Recycle Bin or elsewhere, that I can 
see.

I have not had any big Windows Updates lately, except for a Skype Update.

So any clues or suggestions would be of interest and would be appreciated.

Thank you, from Ron. vk3io.