From CompuHost's main menu (on the top menu bar) select Window->Hide Auxillary/Performer Lyrics Window
NOTE: A "Check Mark" next to the selection will identify that the Auxillary/Performer Lyrics Window is currently "Hidden" from view
To bring back or "unhide" the Auxillary/Performer Lyrics Window, simply REPEAT the same process, from CompuHost's main menu (on the top menu bar) select Window->Hide Auxillary/Performer Lyrics Window