Bakery has two private repositories on github. Unlike Asset Store releases, these are frequently updated and contain latest bugfixes and beta features.
You can request github access here.
bakery-csharp repository contains C# part of Bakery, everything related to the way it communicates with Unity.
bakery-compiled contains core engine-agnostic binary files of Bakery. These should be placed in Assets/Editor/x64/Bakery.
(Private github pages will show 404 if you didn't receive access via first link)