Trouble changing atomic browsers icon

[newdeal]

I am trying to change the icon for atomic browser, i pretty much have changed every single file that looks like the icon in order to try to get it done. The icon changes to what I want (the safari compass) but for some reason the icon has a solid black rounded square behind it. All the other icons i changed have been fine, originally mail which i changed to the osx mail icon had a transluscent grey background which i eventually figured out how to get rid of with a theme but this one for atomic browser just always has this black background behind it even though the icon i am using is just the compass with nothing behind it (just the checker board which shouldn't show up as anything). How do i change it?