There is a new plugin available called “EDD Updates“.
It is an extension for Easy Digital Downloads which will allow for updates to be done without the use of license keys. The settings are essentially the same as the Software Licensing plugin except that it is under the “Updates” section in each download but without any license settings. Plus the settings are separate from the Software Licensing settings.
What can this be used for? Well, if you want to sell a licensed version and a version using EDD Updates for license-less updates you can do that. The use of that here would be that you can sell it on another site and you can sell a licensed version on your own.
This way you will have full control over how you wish to distribute your plugin.