title: Update external libraries with intellij and java
body: <p>I'm using some Apache jars, I'll make changes to the JAR's every so often.</p>
  
  <p>These JARs are listed as external libs in intellij (i.e the classpath is looking to the install dir of the JAR's). Well when I make the changes intellij doesn't seem to know about the new implementation. I have to remove the jar as an external library and re-ad it. </p>
  
  <p>Does anyone know what I have to do so intellij picks the changes up automatically? I've done clean and rebuild project but it had little effect.</p>