title: intellij navigate to file stopped working
body: <p>So we have a large project and I use the intellij navigate to file cntrl+shift+n all the time.  I don't know what happened but now when I try and use it - it can't find anything.  I haven't recently installed any plugins or anything.</p>
  
  <p>I've restarted intellij a couple times, checked the little filter icon to make sure I'm not filtering on anything...nothing seems to be working.  Any ideas what I need to do to get it working again?</p>