If you did not receive the activation code, open the utility, enter your e-mail address and click the blue Resend activation code button. Wait for 10 minutes and check your Inbox and Spam folders. If you can't find the code, try to get in touch with the software developer using the form on the official web page. Also, you can use the online version of the software which doesn't require any activation code. Just select the calculation type and follow the instructions.