That said, Andew o., if you just want to add some content from the new module into your existing game, you can create a game with the new module, and then use the Transmogrifier tool (a pro feature), to move maps, handouts, and characters from the new game into your existing one. It's somewhat inelegant (you can't move whole folders at a time), but it gets the job done. That's how I slotted a Candlekeep Mysteries one-shot into my Storm King's Thunder campaign, anyway.