That's bcs the game tell you when starting the v0.7.5 it say "old save will not work you have to play a new one" until Pytem find a clue for that bug. You'll have to bear with that and you can fast skip if you want to go back fast on where you was last old save.
Once you've completed Annie and Melinda rooms kitchen and living room blueprints are automatically added into Honey's basket. Please make sure you've done those steps before you restart your game :)
I have the same problem. Completely new game (haven't played before) and I bought the blueprints for the 3rd floor and Melinda's room. Then I built the floor and the room and nothing happened. I also can't unlock the pajamas for Aurora or Kat.
After building the third floor go to the third floor at night, then when you build the room for Annie do the same go to her room or third floor (I don't remember) at night. Maybe for some reason the hints are not changing for the events should work perfectly