License file won't insert

I just purchased SecurelineVPN and after I downloaded the Lic file it would not insert when I double clicked on it. I tried through Avast control panel and got the same result.

does this help >> https://www.avast.com/faq.php?q=vpn&authenticity_token=dXnEM%2BqRtOYygxQbH%2F%2Bqdu6OFKuxCmGswvLV9Ca6Cb0%3D#searchForm