Registered User: This is the user to which this version of Overseer is licensed to. This is 'Trial User' for the evaluation version of Overseer, and will be updated when you purchase Overseer and apply the license key.
License Key: This specifies the license key in use. This is '30-day Trial License' for the evaluation version of Overseer.
Days Left: When in trial mode, this value shows the days remaining in your free 30-day trial. When this number reaches 0, Overseer will cease to monitor resources and send notifications. You will still be able to launch Overseer, view and edit your resources, and enter a license key.
License Type: When running a full license, this value shows the number of resources the license allows for. This is dependent upon the license purchased.
OK: This button dismisses the licensing dialog.
Enter Key: Once purchasing Overseer, click this to enter the license entry screen, where you'll enter your registered username and license key.