title: Netbeans runs out of memory after opening many projects
body: <p>I created a projects group for maven projects. Maven being able to build subprojects, there actually are dozens and dozens of sub-subprojects.</p>
  
  <p>Now I have 405 projects open on Netbeans and I cannot use it anymore because when I start it, the system runs indefinitely trying to perform "opening projects" and eventually running out of memory when it goes in the build phase.</p>
  
  <p>I'd like to start Netbeans again without all those 400+ projects. How to do so?</p>
  
  <p>In case it's needed, I use Netbeans 7.4 on MS-Windows 7.</p>
  
  <p>Edit: a now-deleted answer suggested me to close individually each project. This is not possible as the "close project" action is queued for after the build.</p>