I've written a python script that will grab all the files out of your database for you and place them in a local folder called archon_fileexport -- this folder will contain folders with a numerical value (the corresponding archon file ID) which contain the images. This is a command line script and should be run locally. You will need an administrative login, and an installation running 3.20 or above. You should unzip the script, make sure it's executable (chmod +x) and make sure python is installed.
This is an example of how to run it: