This applies to both 55.26 and 56.9. Usually when doing a version update, a backup of your data file is saved to your backup folder with the naming convention: {filename}-R-{version}-{datestamp}.QDF-backup. For the most recent 2 releases this version backup was not saved (or saved to a different location than backup folder). Worth noting that my normal rolling backups are working fine, this issue is specific to version backups when installing an update