Once the program is launched, you will be presented with a list of existing device backups which have been detected on your computer. To access a backup, select it from the list, and hit Explore.
iBackup Extractor can access backups created by iTunes (or Finder if you are using macOS Catalina). It cannot, however, access backups stored in iCloud.
If an existing backup has not been detected, you can tell iBackup Extractor to look in a the relevant location on your computer by using the "Change Backup Directory..." button.
If your iPhone backup was encrypted when you created it, you will need to know your password to view its content and enter it at the screen below. iBackup Extractor only uses your password locally on your computer so that you can open your iOS device backup and does not save or share this.
After this is done, you can start browsing through your backed-up data, and extract it onto your PC/Mac. You can browse through your Calendars, Contacts, Notes, Messages, Photos, Internet browsing history and your iPhone call logs and extract these files to your computer.