I cleaned up the script to use Python’s exiv2 and removed direct reference to exiftool, made gmic optional (as not everyone will use RL-deblur), and updated the hard-coded backslash with os.path.join().
GMIC is referenced in dt_nind_denoise.ini just as a path to the command, so you can just point it to where the .exe file is, otherwise comment it out for now. I’ll look into switching to the Python package.
Wrote a rough documentation, if you could try to get it work on Windows, I can add your feedback/instruction into the documentation. Thanks.
https://discuss.pixls.us/t/feedback-needed-integrating-nind-denoise-with-darktable/