Funny... You are right, in the "World Builder's Guide" there is indeed screenshot of the Realm Management section with Journal button and few other items that don't exist today. Also in Josh's video we clearly see Journal button between Storyboards & Notes....
https://www.youtube.com/watch?v=rzPlQrKIlcY
Even more fun is that I have been using this software for more than 3 years now and I never had this button at all. Probably it was disabled along with the calendars...