Hi, first post, thanks in advance for any help offered. My "applications" folder in the dock has been doing strange things. At first it changed to a crossed out circle icon. Then after downloading some mp3s from amazon it has changed to an amazon music icon. I have tried changing it by ctrl/click, get info, select icon, pasting in a new image. The new image is visible in the finder but when you close the finder the icon on the desktop hasn't changed. Any ideas? See attached screenshots.