This is a full install and will upgrade versions 4.1 thru 5.x in place. Those with versions before Version 4.1 will need to un-install that previous version before installing 5.6x
Current users of QQube who are still within the yearly subscription period can download the upgrade directly from the QQube Configuration Tool under Help>About>Updates. New users need to request the link for a trial download. Installation instructions will be found here.
Earlier release information can be found here