The pc edition is linux compatible so you might want to update the icon thingies
Like the desktop icon? If so, I've tried lol. The .ico and .icns files are where they supposedly need to be(according to the renpy documentation), but for some reason they aren't working. The taskbar icon should be working (granted it's a bit too small). I've still been looking into it and will hopefully have that issue fixed by the next update. :)
If you are referring to another icon then I'm not sure I followed. ^^'