Uefy 2.0 (Pro Edition) is an addon that makes it easy to use Blender’s Rigify system for game engines like UE4.
The old version now called Uefy Script (Lite Edition) has been replaced by new Uefy 2.0 (Pro Edition).
The Pro Edition has a lot of new functionality. It is a good deal easier to use with better workflow and capability. Be sure to check more feature details here.