DVDFab offers a free trial for most of its products in the installer. During the 30-day trial period, you have the opportunity to try out three movie discs each for both DVD and Blu-ray formats. If you receive an expired message before the 30 days are up, it could be due to the following reasons:

1. You may have previously used DVDFab on this computer.
2. The maximum number of discs allowed to be used in the trial period has been reached.
3. If this is your first time installing and using DVDFab on this computer, try deleting all related files in the Documents folder and then reboot your computer before trying again.