: You can use your license on all computers you personally use. There is a security lock after 8 installations that can be cleared via email verification. Google Groups The Companion App (CoApp)

For users who only download audio or simple video files occasionally, a license is likely unnecessary. However, if you are building a video library or need high-fidelity downloads from diverse sources, the premium version is recommended by power users for its speed and final quality. Fake "Video DownloadHelper" extension reviews? : r/firefox