Because "repacked" and "portable" versions are not supported by Adobe:
Adobe Animate CC 2015 151 Portable by Robert Repack can be used for a variety of purposes, including: adobe animate cc 2015 151 portableby robert repack
The 2015 version of Adobe Animate CC was a game-changer in the world of animation. It introduced a more intuitive interface, improved performance, and exciting new features such as the ability to create responsive animations, enhanced color management, and improved collaboration tools. Because "repacked" and "portable" versions are not supported
This specific release was a major milestone as it marked the rebranding of "Flash Professional" to "Adobe Animate CC" to better reflect its support for modern web standards. Notable official features included: the Adobe Blog Creative Cloud Libraries: Integration for sharing assets across other Adobe apps. Vector Art Brushes: enhanced color management