If you have installed Pixometry for the first time you have to create an account from within the software. That will give you a 14 day trial license. If you are entitled to a permanent commercial or NFR license, contact firstname.lastname@example.org after registration. If you already have an account you can use that to login.
If you start the user-interface for the first time after installation, and there is no license installed, you will be led to the login page automatically. Login with an existing account or click the “Create a new account” button, and fill in the form (at least the required fields). Submit the form by clicking the “Create new account button”. You now have a 14 day trial license, that does still need to be activated. In the license overview screen, click the activate button. For more information on activating the license, click here.