It's outhttps://www.sidefx.com/download/The installer is the same for the commercial versions and the free Apprentice edition.New builds are posted every day or two containing bug fixes:https://www.sidefx.com/download/daily-builds/https://www.sidefx.com/changelog/
Houdini 15.5 worked fine.Houdini 16 worked for a couple minutes, then crashed. Now it crashes whenever starting up. Gonna wait for a few builds.