Updates happen in two primary ways, web updates and local add-in updates
1. Web Updates
Web updates happen automatically when you refresh while viewing Content Catalog or upon login. You can see the release number and release notes in the bottom left of Content Catalog as seen in the image below.
Selecting the release number (above) will show you more details and choosing Release Notes (below) link will give even further details from recent releases.
2. Add-in Updates
Content Catalog can be downloaded and installed using the Extension Installation. Check for the software Add-ins available in our Add-in release notes.