In a new project of mine I cannot see the Deployment Assembly link in the project properties. It is There in my other projects which are configured in the same way (as far a
Try to add to your .project file. The Plugin Spy (ALT+SHIFT+F1) is very helpful to find out stuff like that. The Property Page is defined in the plugin org.eclipse.wst.common.modulecore.ui and in the plugin.xml file you can see, that the DeploymentAssemblyPage is enabledWhen the projectNature is org.eclipse.wst.common.modulecore.ModuleCoreNature.