Whole Library including playlists missing after upgrading to v5.3.0

After upgrading to v5.3.0 I have lost all my playlists and library.

I have tried this recommended by pulse but it seems the rekordbox.xml is missing from this location C:\Users\username\AppData\Roaming\Pioneer\rekordbox". I have also tried to re-install so I am hoping the backup edb hasn't gone altogether. I need all my playlists urgently.

PLEASE HELP. The below did not work

"

You can revert to a previous version of your database through an automatically created backup in the rekordbox folder:

Win 7/8/10: C:\Users\yourusername\AppData\Roaming\Pioneer\rekordbox
OSX: /Users/yourusername/Library/Pioneer/rekordbox

Rename datafile.edb to datafile.edb.old
Rename datafile.backup.edb to datafile.edb (removing .backup)

rekordbox automatically creates a backup each time you launch the software; if you have opened / closed v4.2.0 more than 3 times you may not be able to recover your database in this manner. Please check the date / time of the backup files in order to choose the most appropriate version."