Thanks for the answer, I just installed it following the guide.
Just one quick note, I tried following the Basic Usage guide but i couldn't found the skeleton model at their proper place (https://hub.vive.com/storage/tracking/unity/usage.html#draw-detected-hands-as-skeletons). With Unity, I found it under the following path : "Packages/com.htc.upm.vivehandtracking/Runtime/Prefab/RightHandRenderer.prefab" (instead of "Assets\ViveHandTracking\Prefab")
I'm not sure if it's a mistake of the documentation or a problem of installation on my side.