The least complicated might be to stay within the OEM's overly integrated ecosystem. According to the information posted toward the bottom of the webpage at the following link, Peachtree will soon be offering a "Sky" upgrade for $125 installed including shipping both ways, for US customers. Not sure if the free shipping extends beyond CONUS. I suggest that you contact them.

https://www.peachtreeaudio.com/nova150-amplifier-with-dac.html

Alternatively... In your situation, I would prefer to de-integrate much of the computer functionality to something separate and external (eg Raspberry Pi) that I could better manage without relying on the OEM to push a patch or physical upgrade.