At last, the fourth and final preview for 4.10 is now downloadable from the launcher! We are closer than ever to the full release of 4.10, so please take this opportunity to report any issues you found in the 4.10 Preview builds. Thank you to our phenomenal community for helping uncover bugs during these Preview builds so we can make the engine even better.
To get started, head to the "Library" section of the Unreal Engine tab in the Epic Games Launcher, select "Add Versions", and choose 4.10 Preview 4. If you already have Preview builds 1, 2, or 3 then just upgrade when you are ready.
For more information on the fixes included in the release, check out the update from Stephen Ellis on the Unreal Engine forums, and be sure to read up on the known issues list. As a reminder, the Preview builds are for testing only, and should not be used for the active development of your project.