Version 0.4.0

Changed the alpha channel: an account now goes back to the stable build when the release it previewed ships.

Joining used to be permanent. It is not: an account previews a particular release, and when that release becomes the ordinary build the arrangement ends — nothing is run and no request is needed, because the server compares the two release numbers on every call. A preview that is withdrawn rather than shipped ends nothing: the account stays, because the stable build cannot read what the preview wrote. Joining is now only possible while a preview is actually running.

Changed the alpha warning to say when the arrangement ends. The earlier version is kept for the accounts that agreed to it.