Go to Download Manager’s default page and open the package you want to put a lock on, by clicking on the title of the package
In the ‘Edit Package‘ page you will see a ‘Package Settings‘ panel at the bottom of the page, here you can configure your lock options
2.1 Password Lock: Put a password in the box marked red, then update the package
2.2 Email Lock: Select the ‘Lock Options‘ tab in ‘Package Settings‘ panel, check the ‘Enable Email Lock‘. If you check ‘Ask for Visitor’s Name‘ downloader will be prompted to do so. After submitting their email address or both name and email address users will either get a download link or be able to download the package right away based on what you choose between ‘‘ and ‘Download Instantly‘.