OVRPlugin download and installation?

I’m having trouble downloading and installing a newer version of the Oculus Integration for Unreal.

4.22 appears to install with OVRPlugin 1.32.

I’ve set up a GitHub account and connected my Unreal account to it.

I landed on this page but when I click on the “Unreal 4.21 (Latest)” link I get a 404 error on GitHub.

As I understand it I have to subscribe to the Unreal repository on GitHub.
I’d be grateful if one of you fine people could explain the process to subscribe to the necessary repository on GitHub and how to download and install a different version of the OVRPlugin or point me to a post or website.