How to Change Atlanta United to LAFC (Just replacing the details+Logos) FM17 default DB
You need 3-4 things to make this work.
1. You need the database editor, which you can get by opening the steam library change Games item to "Tools" and Download Fm17 Database Editor.
2. Find Atlanta United within the Database Editor via either the Competitons search or the Clubs search, (note down the Unique id) change the things with the first page (details) to fit whatever Club u are changing it to (example for changing the city from Atlanta to Los Angeles). Change the Stadium to the correct stadium (create the stadium if needs be).
3.Find the Fm17 Graphics folder (create on if needed) it should be under this pc>documents>Sports interactive>Fm17 if you already have some facepacks they should be there (find the config file) if u don't you will need to make a config and find an acceptable logo,