@darylsoul - I’m not entirely certain I understand the routing you are seeking to achieve but if you are attempting to get 4 channels out of the UR44 (1+2, 3+4) via the Windows driver (not the ASIO driver), then to my knowledge you can’t. Windows can only direct output to channels 1+2.
It can do loopback with ASIO driver - With loopback activated the Windows audio will appear on input channels 1+2.
Loop back with my DAW is how I get computer audio into my mixes when I need it.
Cheers,
Rob