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Eclipse give me a nice window telling me there is a new version available for my projects. Search of the forum indicates that it is done with ivy xml, but I think latest does not use ivy. How do I update the version in the existing projects? It seems a pity that a click on the advice widow does not do it....
if you have an existing project that uses Ivy, you can still edit ivy.xml to specify the Vaadin version, no problem. Just change the version number after "vaadin.version", save the file and you should be good to go - Eclipse should do the rest automatically.
You can also create projects with Maven, which I would recommend for a new project, but there's no need to do switch away from Ivy if you have a working setup.