That is because the game has two parts: the main adventure and the open world. When the main adventure is done, you get the message wait for the next update plus some hints what is new in the open world part. For that it isn't easy to give hints because you as player can do what you like. The main adventure unlocks the necessary parts so you can doe what you want...
The saves from Nenad always do the main adventure plus the most important parts from the open world. For example opening the chambers in the Doll house etc. If you didn't do that, then the next episode does have new things you didn't see.
If you wit a few days, you can get the final version of my walkthrough for that update. At the end I always point to what is new in the open world plus descriptions of how to go about. Link to the latest is always in my signature. Or go to Willy's bedroom and click on the BlupBlup fish on the wall