These settings will help you to set up the Medved Trader automatic backups (they happen when you start the program).
You enable the backups by checking the Enable Backups option.
The pane on the left lets you select which MT data gets saved during the auto-backup. NOTE: backing up the data files is longer than others, since they can be fairly big.
The Only on First Start of the Day setting controls whether the backup will happen every time you start Medved Trader, or only once a day.
The Backups to Keep setting controls how many such backups will be kept. For example, if you specify 10, only the last 10 backups will be kept, the others will be erased.