Using "Clean Master" I deleted the "calendar storage" system app, not knowing that this is my calendar app. need to find the .apk to re-install. I did find "TouchWizCalendar.apk" and put it into my system/app folder and installed it. I now see the "calendar" app in my app list, but it will not run. I think I may have the wrong version of the apk, or i don't have the correct one. Can anyone help? Using a Galaxy Note 1 phone. Thanks much.