if (prefs.nodeExists(newgui.noSelecionado.toString())) {
        prefs = prefs.node(newgui.noSelecionado.toString());
        password = prefs.get("password", "vazio");

        try {
            if (file.getAbsolutePath().endsWith(".xml")) {

                prefs.put("password", "");

                prefs.exportNode(new FileOutputStream(file));

                prefs.put("password", password);