If you already have an HTC Vive and Steam VR installed, you can download the app here.
If you have an HTC Vive but have not installed Steam VR yet, you can do so by doing the following:
1. Go to the Steam store and install the Steam client.
2. Open the Steam client on your computer.
3. Log into your account or sign up with Steam.
4. Go to the search bar in the upper right, search “Virtually Live”.
5. Scroll down to where it says “Add to Library”.