The link for the new 5.1 from this url: https://developer.nvidia.com/gameworksdownload#?dn=nsight-visual-studio-edition-5-1-0 )
points to this file: NVIDIA_Nsight_Visual_Studio_Edition_Win64_5.1.0.16062.msi, which is RC1 if I’m not mistaken.
The banner in that url state this: Nsight Visual Studio Edition 5.1.0 2016/07/15
so I was expecting a new release with a file version incremented.