烦高手指点一下:
今天我刚启动eclipse,突然发现编辑窗口不能用了.错误提示如下.望指点原因.在线等
 java.lang.ClassNotFoundException: com.genuitec.eclipse.webdesigner2.HTMLMultiPageEditorPart
    at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:403)
    at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:350)
    at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:78)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:275)
    at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1259)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:152)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:142)
    at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:129)
    at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:48)
    at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:240)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
    at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:236)
    at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:252)
    at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:837)
    at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:543)
    at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:365)
    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
    at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:283)
    at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:126)
    at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
    at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
    at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:391)
    at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1102)
    at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1051)
    at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1256)
    at org.eclipse.ui.internal.PartStack.add(PartStack.java:442)
    at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:109)
    at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:60)
    at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:212)
    at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:202)
    at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:753)
    at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:665)
    at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:628)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2323)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2258)
    at org.eclipse.ui.internal.WorkbenchPage.access$9(WorkbenchPage.java:2250)
    at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2236)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2231)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2204)
    at org.eclipse.ui.internal.ReopenEditorMenu.open(ReopenEditorMenu.java:265)
    at org.eclipse.ui.internal.ReopenEditorMenu.access$2(ReopenEditorMenu.java:249)
    at org.eclipse.ui.internal.ReopenEditorMenu$3.widgetSelected(ReopenEditorMenu.java:217)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:90)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3080)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2713)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
    at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
    at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
    at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
    at org.eclipse.core.launcher.Main.run(Main.java:973)
    at org.eclipse.core.launcher.Main.main(Main.java:948)