title: Netbeans stuck at startup
body: <p>I was working with a big project on Netbeans.
  I attached some source code on third party library and all went smooth.
  Today I have the following popup message (I already had seen before obviously):</p>
  <p>The file [...] cannot be safely opened with encoding windows-1252. Do you want to continue opening it?</p>
  <p>The two buttons, yes and no, are not responsive. If I close the popup with the red cross it does nothing after a 1 sec loading.
  Is there a way to &quot;clean&quot; the open file in the netbeans workspace to avoid this error?</p>
  <p>SO Windows 8.1, Netbeans 8.0.2</p>
  <p>Thanks.</p>