The announcement for the latest Zextras release has an incorrect release date of: "Release Date: March 18th, 2020" - I guess it should have been May.
I've also just signed in to get the download link and that's not arrived yet. While I was in the Admin UI I did a check for the latest version and it said I was up-to-date even though I still have Zextras 3.0.8 installed. I've been away for a while and must have missed the 3.0.9 version release announcement. Is there currently a delay getting the download link sent out?