You need to be an Administrator to update licences.
Go to System Administration --> System --> Import
Then go to Licences and click "Update licence" for each row of licences you have.
You need to remove one or more licences that is occupied by users before updating.
Please go to this page:
and follow the guide to remove licences by component or by user.
Server offline "Could not etablish a connection with Online Services":
Please attach a screenshot with information about the installation.