For acceleration of the show of icons Windows stores images in the icon cache. When IconChanger changes icons, it informs Windows that it is necessary to update images.
Sometimes the icon of the object changes, but Windows shows the old icon instead of the former one. To solve this problem IconChanger can rebuild the icon cache on the fly or at all it can remove it. If you have changed the icon but Windows has not changed the image, we advise you to choose Rebuild Icon Cache and if it will not help then choose Remove Icon Cache.