Changing modules

How do you change modules for a game after it was created?  I have a game completely set up...but since I bought last mine of phandelver, I want to use that instead of the half-finished version I was working on.  I have gone through every option, and the manuals, but can't figure this out.  After LMoP I want to move on Storm Kings Thunder, but I dont want to recreate and reinvite everyone...

There isn't really a good way of doing this as a Plus subscriber, you're basically limited to creating a new Game and using the Character Vault to migrate characters over.  At the Pro subscription level, you can use the Transmogrifier to copy pieces between different games with impunity. 

You have to start a new game in order to change modules.  You can transfer the PC and any other character sheets you wish to the new game using the Character Vault. Which is included with the Pus account.  As for handouts and other things you would need a Pro account and use the transmogrifier to port things from one game to another.