I think someone's had this problem before and posted here. Can't seem to find the thread in a search, but I wouldn't really know what to search other than "deleted file"

Have you tried using a recovery tool to get the file back though? (if there's no backup anyways) Or tried it on another system to see if the problem is with the file or the app?

Id recommend Pandora Recovery to get the file back if needed. it hasn't failed me yet.