The Realm Platform Developer edition was designed for developers to get access to a minimal set of functions in Realm Platform they could use in development and in the early stages of the apps release. After careful consideration and a great amount of feedback from our users we will no longer develop, maintain, or release the Realm Platform Developer Edition.
The good news is we now have a free trial version of Realm Platform in the cloud that has all the core features with no limitations on functionality. To get started, visit realm.io.