Quicken Classic for Windows, R59.18
After each Quicken session, I run a backup, saving to a dedicated folder $USER\QBackup. Today (after decades of using Quicken) I noticed a folder Documents\Quicken\BACKUP which has files named similarly, and of similar sizes, to the backup files in my QBackup folder. They go back about 18 months.
What are these files in the BACKUP folder, and can I delete the old ones? Or does Quicken delete old ones automatically after some time has elapsed?