Dragging and dropping the installation for version 1.3.1 will fail; it can only be installed successfully via browsing and selecting.
The update of this version has made a tremendous improvement in sound quality, in my opinion. The details are enriched and much more refined, subtle without being too tight. You can try some songs that used to have fast and chaotic rhythms; you will find that they are no longer as noisy and have become more bearable to listen to. However, due to the overall convergence, there are still some dissatisfactions regarding the naturalness and coherence. This is just what I've noticed from an hour of listening.