java.lang.NoClassDefFoundError: org/openide/explorer/propertysheet/editors/ModifierEditor
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at org.netbeans.JarClassLoader.simpleFindClass(JarClassLoader.java:159)
	at org.netbeans.ProxyClassLoader.smartLoadClass(ProxyClassLoader.java:503)
	at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:147)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:163)
	at org.netbeans.modules.form.FormLoaderSettingsBeanInfo.class$(FormLoaderSettingsBeanInfo.java:42)
	at org.netbeans.modules.form.FormLoaderSettingsBeanInfo.getPropertyDescriptors(FormLoaderSettingsBeanInfo.java:202)
	at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:475)
	at java.beans.Introspector.getBeanInfo(Introspector.java:385)
	at java.beans.Introspector.getBeanInfo(Introspector.java:218)
	at java.beans.Introspector.getBeanInfo(Introspector.java:204)
	at org.openide.util.Utilities.getBeanInfo(Utilities.java:398)
	at org.openide.options.SystemOption.readExternal(SystemOption.java:287)
	at org.netbeans.modules.form.FormLoaderSettings.readExternal(FormLoaderSettings.java:612)
	at org.openide.util.SharedClassObject$WriteReplace.readObject(SharedClassObject.java:689)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1815)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1715)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1301)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
	at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.readSerial(XMLSettingsSupport.java:514)
	at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.instanceCreate(XMLSettingsSupport.java:542)
	at org.netbeans.modules.settings.convertors.SerialDataConvertor$SettingsInstance.instanceCreate(SerialDataConvertor.java:357)
	at org.openide.loaders.FolderLookup$ICItem.getInstance(FolderLookup.java:485)
	at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:875)
	at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:399)
	at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:352)
	at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:399)
	at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:352)
	at org.openide.util.SharedClassObject.findObject(SharedClassObject.java:521)
	at org.netbeans.modules.form.FormLoaderSettings.getInstance(FormLoaderSettings.java:178)
	at org.netbeans.modules.form.FormDesigner.<init>(FormDesigner.java:114)
	at org.netbeans.modules.form.FormEditorSupport$FormDesc.createElement(FormEditorSupport.java:625)
	at org.netbeans.core.multiview.MultiViewModel.getElementForDescription(MultiViewModel.java:185)
	at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:105)
	at org.netbeans.core.multiview.MultiViewModel.getActiveElement(MultiViewModel.java:101)
	at org.netbeans.core.multiview.MultiViewPeer.showCurrentElement(MultiViewPeer.java:213)
	at org.netbeans.core.multiview.MultiViewPeer.peerComponentOpened(MultiViewPeer.java:190)
	at org.netbeans.core.multiview.MultiViewCloneableTopComponent.componentOpened(MultiViewCloneableTopComponent.java:127)
	at org.openide.windows.WindowManager.componentOpenNotify(WindowManager.java:267)
	at org.netbeans.core.windows.WindowManagerImpl.notifyTopComponentOpened(WindowManagerImpl.java:876)
	at org.netbeans.core.windows.Central.addModeOpenedTopComponent(Central.java:583)
	at org.netbeans.core.windows.ModeImpl.addOpenedTopComponent(ModeImpl.java:249)
	at org.netbeans.core.windows.WindowManagerImpl.topComponentOpen(WindowManagerImpl.java:972)
	at org.openide.windows.TopComponent.open(TopComponent.java:305)
	at org.openide.windows.TopComponent.open(TopComponent.java:297)
	at org.openide.windows.CloneableOpenSupport.openCloneableTopComponent(CloneableOpenSupport.java:171)
	at org.netbeans.modules.form.FormEditorSupport.openFormEditor(FormEditorSupport.java:96)
	at org.netbeans.modules.form.FormDataNode$1.actionPerformed(FormDataNode.java:47)
	at org.openide.explorer.view.TreeView$PopupSupport.actionPerformed(TreeView.java:1363)
	at javax.swing.JComponent$ActionStandin.actionPerformed(JComponent.java:3361)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1582)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2897)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2932)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2860)
	at java.awt.Component.processEvent(Component.java:5698)
	at java.awt.Container.processEvent(Container.java:1967)
	at java.awt.Component.dispatchEventImpl(Component.java:4360)
	at java.awt.Container.dispatchEventImpl(Container.java:2025)
	at java.awt.Component.dispatchEvent(Component.java:4194)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1826)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:690)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:938)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:816)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:654)
	at java.awt.Component.dispatchEventImpl(Component.java:4232)
	at java.awt.Container.dispatchEventImpl(Container.java:2025)
	at java.awt.Window.dispatchEventImpl(Window.java:2012)
	at java.awt.Component.dispatchEvent(Component.java:4194)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:592)
[catch] at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:270)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:198)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:171)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:166)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:158)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:119)