Starting 5.5.25 , the license can no longer be updated from Data Platform Admin UI.
You now need to run the Data Platform Config wizard to update the license.
Steps: Run the data platform config wizard located in <Data Platform Install folder>/Bin
After the Welcome Screen - You will immediately see the Activation screen where you can update your license. Update your latest license here and proceed through the wizard. You can use Existing objects , you need not change anything else on this wizard. Just execute it all the way to the end. Ensure it completes without error. This completes your license update process.