After uninstalling the game, did you make sure the install folder was either removed or deleted? If not, check the '..\SteamApps\common\Divinity Original Sin Enhanced Edition\Data\Public' folder anything mod related (or similarly with the GOG install path).
Did you check for (and delete or move) any files in the '..\Documents\Larian Studios\Divinity Original Sin Enhanced Edition\Mods' folder?