So, I installed v6.1 yesterday and found that when in Photoshop 24.5.0 opening either Color Efex, Analog Efex, or Silver Efex results in PS creating a new layer and immediately closing it without ever going into the Nik application. This does not happen if I click on v6.1’s Perspective Efex or Define. These are just examples, not the complete list of apps that do and do not show this problem.
Going back to v6.0 corrects this problem. Reinstalling v6.1 reinstates the problem, so it’s something to do with v6.1 on Windows in the latest version of Photoshop (not beta).
It seems that it is related to the bug I’ve posted in the linked thread. But…
Do you habe tried to deactivate the ‘Use GPU for image processing’ option? If this option is deactivated then it worked as it should.
I have the problems with version 6.0.0 of the Nik Collection. After I have installed the update to 6.1 it seems to work also when the GPU option is activated.
I an using the Nik collection with Photoshop 24.5 and Beta (24.7).
Update - uninstalling 6.1 then running the Nik Cleanup Tool and installing 6.1 again solved all my problems. The cleanup tool runs in PowerShell and takes several minutes to run. Be sure to run PowerShell as an administrator.