I couldn't update WPML. When I checked I was surprised to find that it says we are unregistered. I entered my site key and it's marked as invalid. I suspect it's because we dropped the www in our main URL but I need confirmation.
2. Then, go into the backend of your site, Plugins > Add new > Commercial > UN-register WPML from the old key if necessary, and RE-register WPML with the new key.