So UPB "mode" or "HLC" mode are just two sides of the same thing. The panel turns switches on and off the same way with either. If you want a link to turn all your lights off, just add a link to each switch, call it "All Off" then set the light to go to 0% when it is received. Turn the "All Off" link, and all your lights will go off.
Now to understand the rest, you have to understand how UPB works. When you physically turn a switch on or off, then switch CAN report this to the panel so it knows if they are on or off. That isn't a problem. But a switch can also be set up to listen to up to 16 links. If you have a link called "party" for example, and that link turns a light to 70%, say, when you send it, and the light goes to 70%, the panel has no idea, because switches DON'T send status when set by links. WHY? Well a link could change all the lights in your house, like "All Off" and it would just be too much powerline traffic if EVERY switch reported back.
So in UPB mode, by default, the status of lights changed by LINK is NOT updated in the panel. Ones you manually change DO get updated.
HLC was designed for installer to simplfy installation and give you a nice automated house with not much work. It works with ROOM CONTROLLERs in each room. Each room controller has all off, all on, and four settable scenes. You can program switches with just the panel (UPStart isn't needed.) The panel tracks the status of all lights when you change scenes, it sets the LEDs correctly. And each room can have up to 7 lights, but no more.
I use HLC and it makes a nice system. People use the ROOM CONTROLLERs to control all the lights in a room. And 4 scenes is plenty per room. You can add a HOUSE CONTROLLERs anywhere, and they have one button per room that lights when any light in the room is on. You can also control all lights in any room, all off or all on.
Do these numbers make sense.?
House code = A
I think that is if you use X-10. Doesn't apply to UPB.
UPB Network = 6
Can be anything, just make sure all switches are set to this also.
UPB Status Time = 4
UPB Transmit count = 3
Sounds find. You shouldn't need to touch those.
So if you are in HLC mode, I would keep it. If you follow the rules, everything just works. Use UPB mode if you have lots of time and you want special customization with LOTS of work. Yes you have to set the LEDs in code, you have to poll the switches turned on by links, but All ON or All OFF can be done at any time with either. Just different ways.