Updated recently, and as of today I can no longer switch between the monitor profiles that I've set up. They still exist, but nothing happens when I click between them using the menus or hit the shortcut keys that I've assigned.

Solved: Recreating and re-assigning the shortcut keys resolved the issue.

Same here, i can't even detect one of my LG oled monitors now at all. profiles show an asterix next to them. super bummed with this update

What do the changelogs say?

ChangeLog
Fix: Overhauled Monitor Config/Profile code to resolve some issues with applying configurations and profiles (if you are having trouble loading Monitor Profiles, try re-saving them)

This was the answer.

Unfortunetly the only way I know how to resave them is manualy recreating them from stratch. After recreate all of my profiles again now it is working.

Thanks.

Same here as well. My old profile to switch TV vs. monitor isn't working after upgrading to 9.6

I didn't read the changelog--recreating the profiles resolved the issue.

I can't even remember how to disable a monitor. That or I'm just unable to. Rather than just create all 10 profiles from scratch, I just rolled back to 8.1.2? Is thre any way to get a 9.5 download?

Not able to create new profile because it won't let me enable my LG oled tv and disable my desk monitor when i click apply to save a new profile it says this

An error has occurred while applying your new Monitor configuration.
Please check your settings and try again.
Error: Failed to call SetDisplayConfig. [HR: 31]
[System.Exception]

I was having this same problem with version 9.6.1. I just rolled back to 9.5, and it's working properly again.