You can try deleting/renaming the '..\Documents\Larian Studios\Divinity Original Sin' folder (or playing from a different Windows user account) before starting a new game. I had a problem recruiting the companions (no portraits added for them, though their dialog changed as if they joined the party) in new games started in 1.0.93/95, but a fresh start in 1.0.103 worked fine. I'm guessing something was being carried over from the LevelCache folder.
