Just like with anything else, we need to check the official website of OCS-NG often. New versions and updates are released from time to time. Generally, these updates are not frequent at all, but when they do happen, we need to know how to approach the process.
The latest Windows agent at the time of writing is 4061.1. The UNIX unified agent is 1.1.2. The method for installing newer agents is similar to the way we could update from earlier versions to the current version. We have two (or more) reasonable options for updates.
There is a widely documented bug with Win32 agent versions lower than 4030. There was no silent uninstall available in those versions. As soon as an update was attempted, the uninstall dialog box would pop up. There is no way to eliminate this, except for automating the user click through the uninstall process (with AutoIt, for example). The agent client versions lower than 4030 date back to early 2007's. Reading this book...