I am using windows 7 and i made a big mistake by opening the software "openwith" then selected to "choose default program" after selecting it remaining icons have been changed into the "default program" i selected to open with. Now all of them are same. Watch This video maybe you can help me Click me.
You may try open with > choose back the program(old program) and the icon might back to normal. By the way, next time don't tick on use as default program.