Hello, I have a studio 18/24 but I'm quite sure that this trick is also working with the 18/10.
I manage to do what you are looking for, but it's not exactly "without computer"...
I had the same problem.
Start your computer once the morning,
wait for your Studio 1810 to be syncronize with the computer (I d'ont remember if the UC mixer has to be court-circuited in the options, try both...)
unplug the USB cable !
and then, without computer, the studio's monitoring will still work without the computer.
you can now switch off the computer.
It will work until you switch off the Studio product.
It's working with the 1824...
I hope it can help