If you are activating manually and do not have your License File, the License File Retrieval dialog box explains how to get your License File and finish activation. The dialog box displays the information you will need to get your License File, including:
Host ID
Release number (for example, R2013a)
Operating system user name (Note that user names are case-sensitive in activation.)
Save the information displayed in this dialog box. For example, you can print a copy by clicking Print. Take the information to a computer with an Internet connection and visit the License Center at the MathWorks Web site. MathWorks uses this information to generate a File Installation Key and a License File. You must have this information with you when you return to the computer on which you want to install and activate the software. To exit the activation application, click Finish.