How can I recover files in an app bundle that were lost after an OS update?
I managed to recover my file by downloading the free version of Disk Drill.  I used the deep search options locate removed files on my Mac; you can view results by type of file, however names as far as I can see are not conserved, so you will have to preview each file one by one.  To actually recover the file you must upgrade to the Pro version of the software.