Alienware m15 R2 - HDR option disappeared

Not sure when it happened. I'm going to try a restore to see if this fixes it. I've done a few searches that have turned up disheartening results.

It used to work fine, and it looked great. Monitor is showing up a as a generic pnp monitor, nVidia and all other drivers are up to date. SupportAssist is functioning and not telling me I need any updates.

Any help is appreciated. I really don't want to have to do a restore.