When installing, a temporary license is created allowing evaluation for a few days. This does require access to your system's registry for which you require administrator permission. Use these few days to get a permanent license.
Every license is bound to a key on your system. The bind and its key is embedded in any permanent license you obtain.
Choose a bind method, then click on the 'Request License' button. This button will send an email requesting a permanent license. Add your identification and preferably also your payment reference to the message for quick identification. When payment is received, a permanent license is returned to the sender.
Clear the license field. Then copy the license key in the email message and paste it in the License field. Now click 'Validate' to validate the new license. You now have a permanent license installed.