Thank you so much for this! 
Worked through it again and have it working... almost!
I'm in just downloading the artist image and saving this in the artist folder. Currently it will save it to the album folder, do you know if it's possible to change the syntax to save it up one folder?
e.g. save to "/Arcade Fire/"
rather than the album folder "/Arcade Fire/Funeral"
Thanks again for your help 
You're welcome!
I wrote this more than a decade ago and never touched it since. I'd first have to look into the scripting language of MP3Tag again to understand what I did then. Maybe you're quicker than me with that.
I'm pretty sure It can be done the way you want it.
had a play round with chatGPT but was unable to get it to create the syntax correctly.
seems like it should be possible but my knowledge is lacking!
AlbumArt.exe has a lot of command line parameters.
The one to control the path to save cover art is
/path or the abbreviation /p
You would have to try to find the matching Mp3tag parameter for your "save it up one folder":
%_parent_directory% or %_directory% instead of %_path% in the Mp3tag Tools Parameter definition?
would this work?
/path "..\folder.jpg"
from the original syntax in the guide:
/ar "%artist%" /p "$replace(%_path%,%_filename_ext%,)%%artist%%.jpg"
this is what I have modified so far which pulls in the album artist rather than artist which is what I want and also adds the correct file extension based on the downloaded file.
/ar "%albumartist%" /p "$replace(%_path%,%_filename_ext%,)%%artist%%.%%extension%%"
Ohrenko could add your suggestion to include the whole line so it's clear exactly what to modify?
Thanks!
This is what I found so far:
/ar "%artist%" /p "$replace(..\,%_filename_ext%,)%%artist%%.%%extension%%"
It saves the pic one folder up from the track files folder. It also keeps the original extension of the pic.
It depends how your files are organized. If the parent folder isn't what your looking for - I can't help further.
Thanks @g.p.m
This works!
my only change for my use case is albumartist instead of artist
/ar "%albumartist%" /p "$replace(..\,%_filename_ext%,)%%artist%%.%%extension%%"
This seems like what I'm looking to do, but I am not that knowledgeable, maybe someone can help? All of my music is in a "D Drive" so it's D:\New Audio followed by artist, album, files... I want to apply the band or singer photo to the folders. Is this possible? If so can anyone offer help?
@djerniehoule: After going through this thread with a number of suggestions of what to to - what have you tried and what was the result?
The more details you supply, the better the further ideas will probably be.
Haven't really tried anything yet as I am not that knowledgeable. I was hoping someone could tell me how to make it work. I have downloaded AAD, but that's as far as I got...
There is a tutorial about the albumart downloader:
Thank you, I'll look at this after work!