When you have submitted the online registration form you will be given an online extension license that will extend your existing temporary license to ensure that it does not expire before you receive your full license (sent to you by email). You will only need to install this extension license if your existing license expires.
You can install this license automatically by downloading and opening the License Registry file, or manually by typing in the license code.
See also: Overview, Registration Options, Registration Methods, License Installation, Trouble-shooting