Exactly, it's now up-front paying like in the summer season. Just a bit cheaper (39,50€ for adults).
You shouldn't miss the show "tiempo de fuego" in my opinion, it's a projection mapping show in the Chiapas area with a great "fiery" finale.
There also is the evening show "the magic rose" that ends with a firework every evening, but it's very popular and personally i don't bother with waiting an hour in the cold to see it.
And don't forget to catch some evening rides on Taron. Flying through the fog in the illuminated second launch is just incredible!