Custom Resolution Utility (CRU)

[rpolacek7]

Hello. Upgraded old Sharp TV to new LG C1. Used to hook up HTPC > Denon AVR-X3400H > TV while getting great sound options (DTS, 5.1, etc). New C1 uses eARC, and from looking at reddit threads, there is an issue where LG limits the sound to stereo. That lead me to a proposed fix using CRU, but I am still having issues.

TV: LG C1, HDMI port 4 set to PC mode
Receiver: Denon AVR-X3400H - newest firmware
GPU: AMD RX 480. Drivers - 22.6.1 released 06/22/2022
Connecting to LG C1 via HDMI 2.1 cable

I believed I followed all of the steps of drilling down into the audio formats and adjusting the max channels to 8 (7.1). This was originally set to 2. The pics attached should show all screens. Once updated I did the restart.exe and restarted the PC for good measure. However, the windows configuration still limits me to only stereo.
I tried using either of the HDMI ports from the RX 480. Something that was unique was that my extension blocks on the first screen had "0 detailed resolutions". I didn't see that come up in other people's screenshots.

Any thoughts on what I could be doing wrong?
Thanks.