So I downloaded a mod that changed the faction icons into a Dark UI look. Well when I looked at the folders before loading it with BAIN i noticed 3 folders labeled

Menus
Menus50
Menus80

All three have the same names for the files but the files differ in size. Can somebody explain what the different names of the folders mean? When using the mod should I only go for one folder or are all three needed?

You should install all these folders. Different size icons are provided for different resolutions (50% size, 80% size) so they don't lose quality.
Most icons are provided this way.

LOL I thought of that right after I posted the thread. Guess the thread can be closed. Thanks for helping me out.