title: refresh dat.gui with new values
body: <p>I would like to refresh the dat.gui menu with new values. I have loaded a model and display in  folder the name of the objects inside a gui folder.<br>
  How can I display the new object name when I reload a other model ?<br>
  Or it's possible to reset/clear the gui.
  <img src="https://i.stack.imgur.com/TvLt1.jpg" alt="enter image description here"></p>