How to upgrade vaadin 6.4.8 to the latest 6.7.1

Hello: Is there any steps/procedures documents for the upgrade?

Now I had Vaadin 6.4.8 setup in Eclipse (but no plugin), the code works and okay to pack the .war for web deployment manually.

I want to upgrade to 6.7.1 version, can I get a package to do the upgrade manually - e.g. to replace vaadin-6.4.8.jar, to replace the files under WebContent/ and to replace gwt related jars suitable for the new version. However I didn’t see such a package like 6.4.8.

Thanks!