I was reported to NVIDIA(VisualFX-Licensing@nvidia).
from NVIDIA
Absolutely, is a bug.
It happens when user visit a HairWorks via Outliner.
Now it is fixed.
Please use the attached build.
https://developer.nvidia/gameworksdownload#?dn=nvidia-hairworks-1-1-1
NVIDIA_HairWorks_For_Autodesk_Maya_2016_64bit_1.1.11209.11002.msi