I don't know what is going on. I can change some of my app store icons by simply putting the new icon in themes/(theme name)/icons But, some of them won't change by doing this. Specifically I'm trying to change the MLB.app icon.

The only way I can get it to change is by putting the icon in themes/(theme name)/bundles/com.mlb.AtBat But, when I do that it doesn't matter what size I make the icon it is always the default 50x50 I just want to make the icon bigger to match my other icons.