We recommend that you always run the latest version of UpStream and any extensions you have installed.
You can find the version number for the latest UpStream plugin release by visiting the plugin’s page on WordPress.org. In the image below, the latest version is 1.16.1.
You can find the version number for the latest release of an UpStream extension by visiting the extension’s page on this site. For example, this screenshot shows how to find the latest version number for Calendar View. In the screenshow below, the latest version is 1.0.4.