First and foremost take a look at the installation video here to ensure that you are properly installing the plug-in: http://www.videocopilot.net/products/opticalflares/installation/
If you still encounter an issue with the licensing please try the following steps:
Make sure you have entered the hardware ID exactly as shown, sometimes "5" can be confused with "S" and the number "1" with the letter "I" and so on and so forth.
Please make sure the license file is named exactly as follows: OpticalFlaresLicense.lic
If the save as dialogue box does not appear:
-Make sure to check your browserís download directory folder before trying to generate a new license file as it sometimes will be saved directly into this location.
-We also recommend using the Firefox web browser when generating license files and you may also try clearing your internet cache prior to doing so.