I assume they are the same ones as available through the website?

https://www.copernic.com/en/products/desktop-search/previous...

Unfortunately, from version 3 the free version was severely restricted and I assume it has been chipped away at ever since.

eg. https://pinkeyegraphics.co.uk/copernic-desktop-search-3-a-na...

I'm still on 2.x, it's brilliant though.

There are still legit copies floating about somewhere I'm assuming; it was a free product, it's just no longer available from them.