I am using Quicken Premier Classic R57.16 on Windows 10 Pro 22H2.
I have automatic local backups disabled (Preferences → Backup) and manual backup reminder enabled with the reminder frequency set to 1 time. So every time I quit Quicken I am asked, if I want to perform a backup.
Each backup file has the backup date as part of the file name. Right now I have 80 manual backups and 29 automatic backups (apparently done each time after a new Quicken patch was installed).
A few days (and one or two Quicken patches ago), Quicken has started to delete the oldest backups. Each time I start Quicken it silently deletes the oldest of my qdf-backup files and I don't want it to do that.
Before that recent change Quicken never touched my old backup files and I don't want it to start doing that now.
Unfortunately my interaction with support was less than helpful. The support agent oscillated between advising me to change the number of backup files (which only applies to automatic backups and thus is disabled) and claiming that it must be another software (e.g. antivirus) that deletes my backups since "Quicken does not delete backup files"). And finally when I requested that they forward this issue to development for further analysis, they said they couldn't do that "since development isn't working today". Admittedly it is a Sunday, but don't they use some sort of written communication in their support processes?
I'm hoping that I can reach someone this way who can forward this to Quicken development for further analysis (and hopefully a fix for this in a future version).