I recently tried to upgrade using STS 2.7.0.M2, Roo 1.1.4 and using the Vaadin plug-in. I realize there are issues with the Roo 1.1.4 release so I configured STS to use 1.1.3. All seemed fine at first. I then installed the Vaadin plug-in. The problem is that when I click "File > New > Other" I don't see "Vaadin" listed as an option so I don't seem to be able to access the plug-in functionality. Is this a problem with the 2.7.0.M2 release or is this related to the GWT install/integration errors with 2.7.0.M2?