Launch configuration

Something happened to Eclipse Pulsar. I have a glitch that when I open Eclipse Run>Run I get a

"Launch configuration EclipseStarter references a non-existing project org.eclipse.ui.examples.multipageeditor"

also it says:
C:\eclipse-pulsar-galileo-SR1-win32\intro\sample.xml
(The system cannot find the path specified)
probally because it doesn't exist and don't know why it would even want to look for it.

I can open AVD if I go to it directly, but my program does not show up in the menu.

tried deleting eclipse and sdk files and reinstalling but it did not work. It still has the same error message.