I am currently running Ubuntu Unity 14.04.x and Zorin OS 9 (14.04.x based distro). Both OSs are running Nautilus 3.10.1. Recently, Nautilus 3.18.1 was released. This new version is not in the Software Center for upgrading. And, it appears that Nautilus is not being supported for updates/upgrades when new releases are made. I have downloaded the latest version. However, it is not in the usual "deb". It appears that latest version is not released by specific distro nor supported by Canonical or Ubuntu. So, how do I manually upgrading Nautilus? And, will Nautilus updates/upgrades every be supported?