1. Start FanTestic or FanTestic Integrity. 
  2. Click the "Settings" menu item and then  click "Enter license details".
  3. In the Settings window that opens, click on the [Install License Key] button to show the license key text box.
  4. From the email you received, drag the attached LicenseKey.txt file and drop it onto the license key text box that is open in FanTestic/Integrity.  The license key entry section will close.  
  5. You can tell if your license key is installed when your company name appears in the top of this window, along with your expiry date.
  6. Choose a Standard to use.
  7. Click "OK" to exit and a new test with the chosen standard will open.
  8. If the screen is greyed out and does not let you enter anything, start a new test from the File>>New menu option.