Krypton…what did I download?

I saw on another website that said Krypton final version had been released. I came to KODI’s homepage and saw nothing but Krypton RC4 (which I was already using). I went to the download page and downloaded the “Widows Realease installer” version and installed it. I t was not RC4……….Windows defender said it was a Trojan and quarantined it. I re-installed RC4.
It was dated git…..Feb.1
What was it?