You're not familiar with Windows, do you ? Right-click the icon in the superbar you want to change, right-click the name of the app, then Properties, at the bottom there is the option "Change Icon...", browse, find the one, Open, Ok, Ok.
Or you can use a small program like 7Conifier, that you can find right here on deviantArt, to help.
How do I change the taskbar icon for Control Panel? The shortcut is not in C:\Users\User\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar when I pinned it. I also tried to make a shortcut of CP on the Desktop then changed it's icon but I cannot pin it on the taskbar? Tia~