Lightroom Classic 15.4.1 Update Breaks Export Colors and Denoise

TERRIBLE UPDATE. LR Classic auto-updated with the latest version 15.4.1. I did not ask for that. And since the update, my exports look like a disaster. Completely washed out.

I understand color space - I know they won’t look identical to the original file -- but generally LR did a good job - it was very close. Never had an issue in all the years of using this app. Suddenly now the exports are a disaster.

I immediately downgraded to 15.3.1, and luckily was able to restore my last Catalog as well. (did not update other catalogs, thank goodness)

Well, all that for naught because my exports are now still terrible. I have no idea what is going on. I’m making the edits extreme, in order to somewhat compensate and nothing is changing its he exports. Just absolute dreadful color. And it’s hard to show this considering anything on the web converts to sRGB anyway… so it won’t be true representations. This is the best I can do - a screenshot: http://hnydsn.com/i/6jEPf3

LEFT is the export preview. RIGHT is Lightroom Classic window.

And Denoise has stopped working. I get an error. (http://hnydsn.com/i/kxa0uO) Not sure if anything else doesn’t work since I've only just reverted.

I am at a loss for words right now… sitting here with my millions of photos...

Mac Studio M1 Max / OS 26.5.1