Help! How do I shuffle?

How do I shuffle the deck and get a new deck of cards?

go to the Game Details page, under Decks there is an icon to shuffle

Found it! Thanks!

Oh wow, so theoretically we could play Castle Falkenstein on here?

We use it quite a lot in Savage Worlds. At present, out of the box it supports only poker decks, if that's what CF uses.
I've seen people making Custom decks, with some special coding.

I've used it for Tarot decks, and have posted the rules for that in the Guide section (in a thread Adam created). With custom decks, however, they don't work "without replacement". That is, you could draw the same card twice in a row.