.unitypackage file from the Releases page and drag it into the
Assets/ window of an open project in the Unity Editor. Alternatively, you can double click the Unity package file to open it and then follow the UPM installation instructions.
Registering with the Unity VS Team
It's highly recommended to register your Immutable Unity SDK installation with the Unity Verified Solutions team in case support is required.
To do so, from within the Unity Editor select
Immutable > Immutable Unity SDK from the top navigation window. In the window that opens, enter your email address and click submit.