What is new in the latest version upgrade?
I've visited the official website where PlayMemories Home is located and it appears there was a new update on the 19th December 2016.
Here is the change log:
Performance has been improved for content (photos and videos) stored on external drives (external hard disks, NAS, etc.)
Improved the usability of the search function, RAW image development function and other features.
Use the following link to reach the official website to download the file: http://support.d-imaging.sony.co.jp/www/disoft/int/download/playmemories-home/win/en/