No, the hotfix was well under that, maybe a GB at the most. You’re the second person to report this specific value - around 63-64 GB.
I’m just collecting info for personal datasets hoping it might help Root Cause Analysis later, but:
Are you a Navigraph User?
Did you clear your Community Mods before this update installed?
Did you change or overwrite any core files to the sim like Aircraft.cfg files or BGLs?
Thanks!