A "portable" version is typically a modified, unofficial version of the software that does not require a standard installation. While websites might promote the as a quick solution, users should be aware of several risks:
In 2012, Adobe officially discontinued the product, shifting focus toward cloud-based and streaming content delivery. Since then, Encore has been removed from the Creative Cloud Desktop App and is no longer officially available for download as a standalone product. Adobe Encore CS6 Portable.7z Download
Adobe Encore CS6 was the final release of Adobe’s professional-quality DVD and Blu-ray authoring software. It was originally bundled with and was highly valued for its deep integration with Photoshop and its ability to create complex interactive menus, playlists, and sub-menus for physical media. A "portable" version is typically a modified, unofficial