In the command prompt of the server, execute run.bat command in the bin directory as depicted in the image below,
You will be prompted with a popup stating your license has expired; this popup has 2 options OK and DETAILS. Click the OK button to prompt you for the new license file. On applying the new license, the server will start.
If this does not solve the problem send an email to firstname.lastname@example.org with your license file and our support team will get back to you shortly.