There are some reasons why the code is invalid. Please check the following situations.
1. Wrong spelling of your licensed e-mail address or registration code.
Please copy them from your registration e-mail and paste them into the proper text boxes in the registration window.
2. The regsitration code doesn’t match the version.
Please note that we upgrade our products very frequently, and sometimes you need a new registration code to register the upgraded version, even the upgrade is free. If your former registration code does not work with the free upgrade, you can request a new one from us.
We suggest you download the upgrade version from the link with which we provide the registration code.
To view the version of the software installed on your computer, select About on the Help menu, and you can see the version number in the pop-up window.