I have Nik Collection Version 3.3. How do I get the 25th Anniversary. Mac Big Sur. I also Have DXO Photo lab 4.
Welcome Etienne,
You can find the new recipes for Color Efex Pro 4 in the Recipes Library - 25TH ANNIV.
You can find the new presets for Silver Efex Pro 2 in the Presets Library - 25TH ANNIV.