You are currently running Yahoo! Messenger 22.214.171.124. A newer version, Yahoo! Messenger 126.96.36.199 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 188.8.131.52 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