Because Flowgear is a cloud platform, we can update parts of the software periodically without impacting our customers.
When an update to a Node is published and you're still using an older version, the Node Header will be red.
To upgrade the Node, right click on the Node context menu (arrow to the right of the Node name) and select
Upgrade This Node
Upgrading a Node ensures that it's good for the latest app/software release but will also retain backward compatibility. For example, upgrading the Sage Evolution Node will ensure you can now use your Workflow against the latest release of Sage Evolution but if you haven't yet upgraded Sage Evolution, it will continue to function as normal on that version.
Note that we strongly recommend re-testing Workflows containing upgraded Nodes before using them in production. One easy way to do this is via Release Management.