I recently installed Photolab 5 and the new NIK Collection on a Mac running Monterey.
All worked as expected for 2 days.
Now, when I export a file to NIK, NIK does not open. The Photolab window and controls remain visible. However, a new file is created in the library created by NIK export.
Hi Donna. I would at least try the uninstall reinstall procedure. Also download a fresh copy of Nik5 from the DxO website and the install the new copy. It may not solve the problem but is worth trying.