1. go to https://wpml.org/account/sites/ look for your current key and erase it;
2. create a new one for your site; (including your HTTP or HTTPs)
3. go to Plugins → Add New → Commercial;
4. click on the Unregister WPML from this site button;
5. register WPML adding your new key;
You have to use the full path of your site. Including HTTP/HTTPs with or without WWW just as you set your site.
Basically what you set in Settings > General WordPress Address and Site Address: hidden link