While Wonder Lister does automatic database backup based on the frequency of backup you set as per your preferences, it is advisable to do manual backups. Automatic backups can fail say if the hard drive runs out of space. Doing manual backup will show any such error and corrective action can be taken. To do manual backup, follow these steps:
Use the menu option:
Tools > Options > Backup Database
Backup operation gets started. It is highly recommended to wait until backup is completed.