I want to use GWT Designer to create UI for web page, i installed SDK and GWT Designer and UIBinder, WindowBuilder. I use eclipse Kepler. It was istalled succesfully, but i can't open a class in Design mode. Get `Internal Error encountered unexpected internal error.
This could be caused by a bug or by a misconfiguration issue, conflict, partial update, etc.
java.lang.NoSuchMethodError: com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(Lcom/google/gwt/core/ext/TreeLogger;Ljava/lang/String;Z)Lcom/google/gwt/dev/cfg/ModuleDef;
is it working version available now, or it can't be used?