Just to be clear, after an update of the game: --dataPath your:\path\here --addModPath your:\path\here
And if the game still doesn't load your mods, open the new data folder, then the "clientsettings.json" file, scroll all the way to the bottom of the file, and below "modPaths", change to the path of the Mods folder located in the new data folder.
Thanks @Streetwind for the detailed method.