Encore is no longer in active development. Encore CS6 was the last version released.
The CS6 applications are still available are part of a Creative Cloud membership. Encore is installed by first installing Premiere Pro CS6, which includes Encore CS6.
This document describes the process of installing Encore CS6.
Note: The ability to install CS6 applications is available only to paid Creative Cloud subscribers is and not available with trial memberships. It is not possible to install Encore CS6 with a trial membership to Creative Cloud.
Download the application
You can install previous versions directly through the Creative Cloud desktop application, however, previous versions are hidden by default.
To reveal previous versions, do the following:
Premiere Pro CS6 will download and install. Encore CS6 will be installed along with Premiere Pro.