How to set source folder for watching movies in Kodi 17

I just installed this last night after years with Kodi 15. So I load it up and it apparantley has searched all of my hard drives for movie files and some movies appear 1, 2 or 3 times since I have backups of backups.

How can I have Kodi 17 point to one single folder where I store my movies and not look at every single drive I have connected?