You are currently running Yahoo! Messenger 220.127.116.11. A newer version, Yahoo! Messenger 18.104.22.168 is now available. Please update your version of Yahoo! Messenger to ensure that you have the latest features and security updates. Click the “Update Now” button to continue.
Just noticed that newest version for Yahoo Messenger 11.5 for version 22.214.171.124 is available. As usually, we always provides the Offline installer aka Stand Alone installer for YM in which you don’t need to install it online. Just download directly from Yahoo Server, and then click the installer to update your Yahoo Messenger