Does nVDF really work

Somewhere on the internet it says: "nVDF – can be only used to Version 9~14"! So I tried downloading free Antivirus v12, 13, 14, but they don't have a valid license key and so the manual updates don't work.

 

There are only valid license keys for v15 and those manual updates are being delivered and when I install them, they seem to work very good in v15.0.17.273.

 

My question is: The virus definition files seem to work but have a lower update number after doing the manual update! I know that it is not supported anymore, but nVDF is being delivered, so the question is:

 

Does nVDF really work in version v15.0.17.273 or does it only look like it works?