def on_change_dir_button(self, event):
        """
        create change directory frame
        """
        currentDirectory = self.WD #os.getcwd()
        change_dir_dialog = wx.DirDialog(self.panel,
                                         "Choose your working directory to create or edit a MagIC contribution:",
                                         defaultPath=currentDirectory,
                                         style=wx.DD_DEFAULT_STYLE | wx.DD_NEW_DIR_BUTTON | wx.DD_CHANGE_DIR)
        result = change_dir_dialog.ShowModal()
        if result == wx.ID_CANCEL:
            return
        if result == wx.ID_OK:
            self.WD = change_dir_dialog.GetPath()
            self.dir_path.SetValue(self.WD)
        change_dir_dialog.Destroy()
        wait = wx.BusyInfo('Initializing data object in new directory, please wait...')
        wx.SafeYield()
        print('-I- Initializing magic data object')
        # make new builder object, but reuse old data_model
        self.er_magic = builder.ErMagicBuilder(self.WD, self.er_magic.data_model)
        print('-I- Read in any available data from working directory')
        self.er_magic.get_all_magic_info()
        print('-I- Initializing headers')
        self.er_magic.init_default_headers()
        self.er_magic.init_actual_headers()
        del wait