Try re-pairing the remote. It will fix battery life issues (caused by excess frequency hopping).
Remove the USB from Vero 4K
Hold Home and OK button for 5 seconds or so, then the blue LED will keep flashing.
Plug in the USB receiver and the LED should flash 3 times after 5 seconds, indicating successful pairing.
Power off Vero 4K for 2 minutes. Turn it back on. The remote should now work.