Adding a module to an existing campaign?

What it says on the tin - I'm running LMoP for some buds off the hard copy version but have been considering buying the Roll20 module for ease; can I just integrate that into the existing campaign, or would it require me to start over?

Only Add-ins can be loaded into an existing campaign. You would need to start a new campaign with any Module. You can transfer characters using the character vault though.

If you have anything else (custom maps you want to keep, handouts, Rollable tables, etc...) you’d need a month of Pro so you can use the transmogrifier to move them. 

All right, thanks for the clarification guys!  I appreciate it.