[ufocia]

It does not belong to the society (whatever that's supposed to mean). It is not in the public domain as far as we know.

[exe34]

It was bsd licensed. The code that you received before is still covered by the bsd license. You can pretty much do anything you want with that code except misrepresent yourself as the author.

Public domain isn't the only form of free software. You can literally use it in exactly the same way as you did before. Nothing has been taken away from you.

Does this address your concern?