Yep, Edge Animate will be downloaded via Creative Cloud ( http://creative.adobe.com ) logged in with your AdobeID. And i had to remove my last preview before installing, so this might be mandatory (search for an uninstall link in your edge preview folder).
Thanks for posting this, Franck!
You are correct that you do need to uninstall the Preview before installing the release version.
On Windows, you uninstall it from Programs And Features in the Control Panel. On Mac OS, you run the Uninstaller from the Edge Animate Preview folder in /Applications.