Re-attempted update via Docker, and it worked no problems. Rebuilding library now. Here are the steps I used for the update:
Double checked that no Roon related directories existed in /mnt/user/appdata
Installed Docker via these steps
Clicked Check For Updates via unRaid GUI Docker tab at bottom, nothing found
Connected via Windows 10 Roon app
Disconnected VM version Roon Server, Connected to Docker version
Roon server installed version 1.7 build 537
Clicked “Unauthorize” VM version Roon Server, logged in to Docker version with Roon credentials
Clicked Relaunch in Windows Roon app > Settings > About