Plug in any controller to enroll, or to manage your boards.
When a new beta is ready, you get an email.
Beta firmware is delivered through update.mariusheier.com.
Next beta: Xinput — ETA Late April / May.
Beta firmware is added manually, usually within a day. Check update.mariusheier.com.
If it's missing, ping Marius in the #beta channel on Discord. Server invite here.