if you lke the old beige folders more than the yellow-orange ones, there is hope for you. You can use the folders from the legacy (older) edition.
First get the legacy icons from git hub and put them in the right place
git clone https://github.com/numixproject/numix-icon-theme-square-legacy.git
sudo mv Numix-Square-Legacy /usr/share/icons/
Now edit the index.theme file for non-legacy Numix Square
sudo gedit /usr/share/icons/Numix-Square/index.theme
On line five, have Inherits=Numix-Square-Legacy,Faenza
Numix Square should now be using the legacy folders
Numix Square Legacy itself is vintage (!!) Antergos icons, but there are some sizing errors in Cinnamon with some icons for some reason (don’t think it is true for other DEs). But the folders work perfectly fine and that is all you are using from the set here.
Maybe there is a much simpler way to do this, but this is the only way I could get it to work. This also works for any other icon set if you want the folders from it only.