title: Remove duplicated Scala Applications in the memorized list in Eclipse
body: <p>I'm using Scala plugin 3.0 in Eclipse Juno. When I run a Scala program using "Run As >> Scala Application". Eclipse will launch a new Scala Application and then run it. If this program has  run before, Eclipse still launches a new one instead of using the memorized old one. For example, I ran AggregateActionTest.scala several times, eclipse will generate many applications instead of one. I do not like this style. Is there any way to handle this problem?
  <img src="https://i.stack.imgur.com/lYpU2.png" alt="enter image description here"></p>