: Official license keys are typically permanent or based on the version purchased. Updates to the extension itself occur automatically via the Chrome Web Store Firefox Add-ons Key Features of the Premium License Watermark Removal

Your DownloadHelper license key is required to activate the full features of the extension. If you're using an outdated license key, you may not be able to access all the features or receive updates. Updating your license key ensures that you have the latest features and security patches.

: Open your browser (Firefox, Chrome, or Edge), go to the extension's settings/preferences, and find the Licensing or Premium section.

Since DownloadHelper lives in your browser, fake updaters often install malicious extensions that redirect your searches to ad-filled garbage sites or steal your session cookies.