Alex was worried. He had unknowingly purchased a pirated license key, which could compromise the security of his computer. He quickly contacted the website where he bought the license key, but they had vanished into thin air.
Considering purchasing a licence - a few questions first #963 - GitHub
A Video DownloadHelper license key is primarily used to remove watermarks (QR codes) from converted videos and to unlock premium features like audio-only conversion. Licenses are between browsers; a key purchased for Firefox will not work on Chrome or Edge. How to Get and Manage Your License Key