Sorry for the super late response but… Do the following steps…
1.Build the “Development Editor Win64”
2.Build the “DebugGame Win64”
3. Rename the “UE4Game-Win64-DebugGame.target.xml” in Engine/Build/Receipts to “UE4Game-Win64-Development.target.xml”
4. Opened HairWorks sample in the Editor then File-> Package Product -> Windows -> 64-bit
Make sure you have renamed it correctly so it’s NOT UE4Game-Win64-Development.target.xml.xml