Append date/time to the output file name. You will find this option in the Desination setup. Each file will have date or date and time of generation as part of the name, so it does not get overwritened. You can use Folder Housekeeping to tell CRD to delete everything older than 5 days.

Or, switch on "Snapshots". This will keep copies of the past reports in CRD so that you can view them and recreate them if you need to.