Hello all, I want to update my late 2011 Mini Server's OS (pre-loaded) Lion 10.7.5 and Server (1.5.0) to Sierra, which I downloaded but have not installed. The App store shows MacOS Server (5.3.1) for $19.99. Does installing Sierra also update my Server (1.5.0) to a newer version? If yes, which version? If no, is there a free Server update version available?