This game updated last month to version 1.62. It's available on AS. There is new content, mostly in the house accessed from the forest that contained the male-female sword. To access the new content, you need to beat the game and get End A, even if you have done so before. You will now be asked to save afterward. Load that save.
New scene: The Cheshire Cat is in the Passage near the Station after loading the completed save. Talk to the Cheshire Cat (as either form), then do so as Louis. Say yes when asked.
New Endings:
End P: Sleep in the bed in the new area (there's only one, in a puzzle room) as Louis
End Q: Lose to the witch in the new area as Alice (losing as Louis just gives a generic game over)
You can re-fight the final boss by going back after loading the completed save. There is no penalty for losing this time, but you cannot get any related ends you may have missed.
The witch at the end of the new area will only fight you if you extinguish the candles in her room and then speak to her. Before you do that, talk to the witch and pick the first option to get her broom, a powerful weapon for Alice. Also, don't try fighting the witch without saving first, as the witch is incredibly powerful and losing causes a game over. She supposedly is not impossible to defeat, but I have not been able to do so as of yet.