Clear SharePoint Designer 2013 Cache

"Cannot perform this operation. The file is no longer checked out or has been deleted."

1.     Close sharepoint designer

2.     Delete everything at %USERPROFILE%\AppData\Local\Microsoft\WebsiteCache

3.     Delete everything at %APPDATA%\Microsoft\Web Server Extensions\Cache

4.     Go to sharepoint designer  options –> General –> Application Options –> Uncheck the “Cache site data across SharePoint Designer sessions”