Lightroom Classic 7.3.1: Since update, the presets don't work

In Help menu > System Info, can we get the first few lines please? That might offer some clues. Also, in the Basic panel, can you see the Profile pop-up, or is it still down in the Calibration panel?

Lightroom Classic version: 7.3.1 [ 1167660 ]
License: Creative Cloud
Language setting: en
Operating system: Windows 10 - Business Edition
Version: 10.0.16299
Application architecture: x64
System architecture: x64
Logical processor count: 12
Processor speed: 3.1 GHz
Built-in memory: 16308.3 MB
Real memory available to Lightroom: 16308.3 MB
Real memory used by Lightroom: 6917.5 MB (42.4%)
Virtual memory used by Lightroom: 11932.1 MB

Hi Craig,

Did you try the Adobe provided presets, which are at the top of the presets panel? Do they work?

They do not work either - same thing. The photo displays a filter, but when I remove the mouse from the preset list, it stays the same.

Craig, 

Based upon the behavior you are seeing, I feel it is time for the dreaded Preference File Reset. Here is the procedure.

1. Close Lightroom.
2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom. 
3. Overwrite the Preferences when prompted by the dialog.
4. Close Lightroom.
5. Restart Lightroom.

Does the preset behavior continue after resetting the preferences?

Worked like a charm!!!  I took photos of the Preferences before I reset so that I can set them back again.
THANK YOU!!!!!!

I have the same issue.
But when launching Lightroom and holding Alt + Shift nothing happens (windows user)
Tried to restore all my preferences and restarting LR but still no preset is working. Even those I try to create. Nothing. I can get only a preview but can't apply any.

Can somebody help? I'm not native english speaker. Maybe I can't understand the instructions above : (

In order to use the [Alt+[Shift] launch sequence you need to be clicking on the actual Lightroom program file - not a desktop alias. See if that lets you reset your preferences. 

thanks.
I was able to reset preferences etc like in your step by step but the problem remains.
In the meanwhile I've noticed that also my HSL do not work.

I have this weird version Adobe Photoshop Lightroom 6
version 7.3 Camera Raw 10.3

Have you installed today's update? Lightroom Classic CC Version 8.0?

oh I definitely will!

Hi Rikk,

I know it's been 11 months since you've been on here, but I'm having the same problems as the original poster now, although slightly different. Some presets will stay, others will not. I tried some of the Adobe ones and others of my own making. Some stay and some will apply, but the minute I take the mouse off the preset title, an altered look that's not the original, but not the preset will show up. It's almost like the temperature changes when I remove my mouse from the preset title.

I have the most current version (8.4.1) on Mac OS 10 (version 10.14.6).

I tried the above commands to set the preferences, and I kept getting a window asking me what catalog I wanted to open rather than a preferences reset. Is there an updated way to do this?

Thanks.