Getting a mod to be effective mid-game (or removing a mod midgame) takes a bit of save file editing.
A) Create a new game with 1 mod enabled. Save it as a new save file when you exit Character Creation.
B) Go to Documents/Larian Studios/Divinity Original Sin/Player Profiles/(Profile Name)/Savegames/(New Save name)/ and copy the meta.lsb there
C) Go to your old unmodded savegame folder and paste the meta.lsb you just copied, replacing it
D) Start up the game again and load your previously unmodded save. It should now have the mod effects. You may need to teleport to reach the map you were previously at, since it'll load in Cyseal regardless of where you were before.
