Thank you for the downloader, it's really great!
Don't know if anyone would find this useful, but I created a simple python script to extract all the files from the subfolders into the main folder, just in case you, like me, want to see all the thumbnails at once and don't care about the subfolders' names
import os
from os.path import join
from shutil import move
links = [r"your folder location "] #if you have more than one folder, add it after a comma and preceded by 'r'
for link in links:
root=link
new_directory = "everything"
destination = os.path.join(root, new_directory)
os.mkdir(destination)
subdirectories = os.listdir(root)
for subdirectory in subdirectories:
if subdirectory != new_directory:
for filename in os.listdir(join(root, subdirectory)):
move(join(root, subdirectory, filename), join(destination, filename))
os.rmdir(join(root, subdirectory))
for filename in os.listdir(join(root, 'everything')):
move(join(root, 'everything', filename), join(root, filename))
os.rmdir(join(root,'everything'))