Hi,
I have managed to write a python script on my free time, which should work just fine in your case.
You need to place it in a root directory, where all Corona Proxies, and sub-directories with Corona Proxies are placed.
It will go through each folder, and if there are Proxies, it will create "Animated proxies" and "Static Proxies" folders in that directory, and copy corresponding proxies (just to be safe) to these folders, effectively grouping them, for each directory and subdirectory.
You can then quickly pick the ones needed and place them in a separate folder, if needed.
Make sure you have Python 3 installed, place the script at root directory and just run it.
Let me know if this helps.