homer faris abney These 2 files are Quickstart packages which are used for a new Joomla site only.
To install latest version of S5, pls access the download section of product you want to install and get the latest file + install directly into your site.
With Purity IV template, you can use JA Extensions manager component (Free component) to update latest version: https://www.joomlart.com/update-steps