I am trying to use the Nic python filters. They dont work for me. Do they have to be installed in GIMP 32 or 64 bit or does it not matter> I have GIMP 2.10.28 and I also have GIMP 2.8 on my older laptop. They do not work in either. Also, do I need the photoshop filter plug in and if yes, would I need the 32 or 64 bit? Most older free photoshop filters are 32 bit. Some are 16 bit. Can someone direct me or post the recommended photoshop 32 and 64 plug in? And is the python version of the Nic filters as good and how to get it to work... Thank you much.

https://www.dropbox.com/scl/fo/r27rblkm ... chbnmmlabe
I have this one for you... it works for me!

Still not working
An error occurred running python_fu_color_efex_pro
WindowsError: [Error 2] The system cannot find the file specified
Traceback (most recent call last):
File "C:\Users\josef\.gimp-2.8\plug-ins\gimpfu.py", line 740, in response
dialog.res = run_script(params)
File "C:\Users\josef\.gimp-2.8\plug-ins\gimpfu.py", line 361, in run_script
return apply(function, params)
File "C:\Users\josef\.gimp-2.8\plug-ins\NIKColorEfex.py", line 92, in plugin_main
child = subprocess.Popen(args, shell=False)
File "C:\Program Files\GIMP 2\Python\lib\subprocess.py", line 710, in __init__
errread, errwrite)
File "C:\Program Files\GIMP 2\Python\lib\subprocess.py", line 958, in _execute_child
startupinfo)
WindowsError: [Error 2] The system cannot find the file specified

As it happens I was looking at this yesterday. Using Win10 64 bit / Gimp 2.10.30

You have the google-nik installer ? A bit of a monster 430 MB or so. Install to the default location, The Gimp plugins are set up for that location. You can test if the nik filters work. Each is a xxx.exe file. The Gimp plugins use the 64 bit versions. As a test drag-drop an image file onto the filter. example: https://i.imgur.com/eHHyjB4.mp4

Then you need the nik plugins from a Partha Gimp installation (or the link posted in the previous post). These go into the usual Gimp User plugins folder. Do not bother with the folders shown in the animation, put the python plugins straight in. The plugin makes a temporary file, sends it to the xxx.exe file just like above, Save the filter adjusted image and it gets sent back to Gimp.
Example: https://i.imgur.com/W8uUfLg.mp4 I had to trim this down a little to fit it into 60 seconds but you should get the idea.