Norton Utilities 16 - System Tray icon missing?

I have just updated from NU 14 to NU 16. When NU 14 started it would present the normal interface. I would click on the "X" in the top right, and it would minimize to a system tray icon. When I click the "X" in NU 16 there is no system tray icon.

Need I simply minimize NU 16 so that it continues to function, i.e., does clicking the "X" close it and turn off its functions?

The system tray icon was handy in NU 14. I'd like to get it back, if I can.

= = =

Perhaps I am missing something here.

Does NU "run" continuously in the background as does Norton Internet Security (also installed), or is it a set of functions that only work when invoked?

Thanks.