can i downgrade my firmware?

so i just bought a used lg 65uq8000 that had firmware somewhere in the 3s and i stupidly allowed it to update before checking anything root. its now on 4.41.39. id like to go back to 4.41.37 so i can root, is it at all possible or did i just shoot myself in the foot unless a new exploit is found? im ultimately looking to run hyperion ng locally so i dont have to deal with a pi/hdmi splitter/capture/etc