title: theme.res file does not open anymore, codename one themes
body: <p>Themes.res file is not opening.
  <img src="https://i.stack.imgur.com/GTJjb.png" alt="enter image description here"></p>
  
  <p>What do i do ?</p>
  
  <p>However, the app is working.</p>
  
  <p>The exception that I am getting on the console while opening the file is:</p>
  
  <pre><code>java.lang.NullPointerException
      at com.codename1.ui.util.Resources.createImage(Resources.java:936)
      at com.codename1.ui.util.EditableResources.createImage(EditableResources.java:2332)
      at com.codename1.ui.util.Resources.loadFont(Resources.java:1119)
      at com.codename1.ui.util.EditableResources.loadFont(EditableResources.java:1932)
      at com.codename1.ui.util.EditableResources.openFileWithXMLSupport(EditableResources.java:426)
      at com.codename1.designer.ResourceEditorView$LoadResourceFileAction.exectute(ResourceEditorView.java:4112)
      at com.codename1.ui.resource.util.BlockingAction.run(BlockingAction.java:88)
      at java.lang.Thread.run(Unknown Source)
  </code></pre>
  
  <p>Is there any way I can recover this file / data ?</p>