Techno Lok

This is probably because the same jar is included more than once in your project.  If so, ensure that your project only includes it once (that it doesn't appear in referenced library projects, or build paths, etc).

Its possible to remove the workspace in eclipse without much complications. The options are available under Preferences->General->Startup and Shutdown->Workspaces. Note that this does not actually delete the files from the system, it simply removes it from the list of suggested workspaces. It changes the org.eclipse.ui.ide.prefs file within Eclipse. See the screen shot below for your reference.