Hi @http06 thanks for your query. The Tobii Pro VR Vive and its’ associated Unity SDK is part of the Tobii Pro Business Unit.
This forum is intended for The Tobii tech range of trackers (4C, EyeX) which is indeed have their own, quite seperate, Unity SDK.
Please kindly get in touch with Tobii Pro Support @ https://connect.tobiipro.com/s/?language=en_US and the team there will get back to you.
Apologies for any inconvenience and thanks for your understanding.