And the same slowing of performance for me, too. The inpainting brush being a perfect example - immediately prior to this update it was virtually instant to use.
Now I see a red highlight over the area I select for inpainting, then a dialogue box appears with a progress bar (I'd never seen before v1.7) whilst the process is completed. I should clarify that the inpainting tool is far from the only function brought to its knees.
Additionally, all of my interface settings, layout, macros, toolbar all gone now, too.
With the Nik Collection now also impossible to use since V1.7, I hope Serif can resolve these issues quick-smart!
Kind regards,
AF