I noticed that the App Store version of CCleaner says for OS 10.5 and newer, yet it is NOT the version found at the link above (that version fails to run under 10.9). Any idea when that will be updated? And thank you very much for that link. While I prefer to get things installed through the app store for the ease of updating, it is wonderful to have the newer version that runs on 10.9 available again. Honestly, I don't know how I lived without CCleaner now that I've gotten used to using it.