If you deleted files from you iTunes Library, you can use this app to clean your playlist and remove the missing files. Note that the program ONLY use the iTunes library, not your files, so it's safe and clean. Note if the itunes windows opens, don't worry it's normal.
What's new in version 1.0
ReleaseJanuary 8, 2014
Date AddedJanuary 8, 2014
Operating SystemsWindows 10, Windows 2003, Windows Vista, Windows, Windows 2000, Windows 8, Windows Server 2008, Windows 7, Windows XP