Read the official Contao announcements.
TYPOlight 2.4.4 is available
by Leo Feyer – Announcements
TYPOlight version 2.4.4 is available. The new build includes some important hooks that are required by some third party extensions (e.g. form2db). There are still some major tasks on the roadmap that have to be completed before the next major version (2.5) can be released.
As from version 2.5, TYPOlight will most likely be released under the LGPL (lesser general public license) to allow third party extension developers to release their modules under a commercial license, too.
You can get the latest build via live update.