Thanks for the tip. Not knowing how to add album art was driving me nuts about a year ago, then I ran into Media Monkey. I use this to update tags and album art. Just install the app navigate to the album folder with the app then click Tools -> Auto Tag from Web. The popup will show search results of the album. WARNING: be sure to uncheck everything you do not want to update and leaved 'Cover' checked, then click Auto-Tag. That's it.