There is a not-very-prominent warning about excluding Adobe apps from this utility's cleaning (removing un-needed language files will prevent the app from opening, and re-installation is REQUIRED!!!). It is too, too true. It wrecked my Acrobat Professional before I saw the warning & was able to stop it. Yes, you can uninstall the remnants & re-install, or try to figure out what files need to be re-installed through Pacifist, but who needs that? The developer needs to make the warning far more prominent, and exclusion window clearer. Too bad, because Adobe is loaded with these never-to-be used, bloated language files. Otherwise, has been a very useful utility for me