Read the official Contao announcements.
TYPOlight 2.3.0 is available
by Leo Feyer – Announcements
TYPOlight version 2.3.0 is available for download. There are a lot of new powerful features like a source editor, a completely new search algorithm, two developer tools and three new languages (French, Polish and Russian). We have also fixed a lot of bugs and improved the maintenance module (cache and search index). You can now build the search index from the back end and do not have to open each page to be indexed anymore.
Download this release from github.com.