Did you save a backup copy of the downloaded file? If so, you can work from that, if not I think we've all learned the hard way to back up files and then backup the backup.
Ted Boliske
Mac OS 10.12, 10.14, 10.15, Win7, Win10 VDL2.5.5, Finale 2010-14.5, Finale 25-27 Kontakt 4-6, various other soft synths