Hi,
Sorry for the issues here.
To manually update a plugin follow these steps here:
Manual Updates
That process does not delete or change settings, but as the guide says it is always a good idea to backup first.
If you added the license and clicked save and got a confirmation message the automatic updates should be setup.
The system does not check for updates on ever load so it could just be waiting for its next check time too.
Let me know if you have any follow up questions.
Thanks