title: How to reinstall an Eclipse plugin after its modification?
body: <p>Sorry for the question but I'm at the end of my wits. I'm very far from Eclipse plugin development and Java in general.</p>
  
  <p>Eclipse version - Juno.</p>
  
  <p>I needed to customize DSF-GDB plugin of Eclipse-CDT. I downloaded CDT sources, created a PDE project, imported there <code>org.eclipse.cdt.dsf.gdb</code> plugin, fixed configuration errors so that the project could be built. I did my change (removal of one baneful line) Then I exported my plugin via <code>Export...-&gt;Deployable Plug-ins and Features</code> and got my JAR file.</p>
  
  <p>I've seen a couple of questions at StackOverflow regarding installation of such plugins so I put my JAR file under <code>dropins</code> folder. But it seems it hadn't been included for I didn't observe it neither under <code>About Eclipse SDK-&gt;Installation Details-&gt;Plugins</code> nor under Preferred Launchers (there was only the old one).</p>
  
  <p>I thought probably it was because there could not be two instances of the plugin at the same time. So I tried to remove the original one from under <code>plugins</code> directory. It didn't help though, DSF-GDB integration disappeared completely.</p>
  
  <p>How do I install my plugin properly?</p>