Well according to the update page, if you install Poser SR3, the Queue Manager SR3 updater will be installed WITH that.

There is a separate Queue Manager SR3 updater for use on render nodes (in other words, if you don't have Poser installed on other computers on your network, but you use the Queue Manager to spread the load to other computers).  THOSE are the computers that you install the separate Queue Manager SR3 updater onto.