Dialogs in SoapUI have become unusable

UIDefaults.getUI() failed: no ComponentUI class for: javax.swing.JInternalFrame[,0,0,0x0,invalid,hidden,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=0,maximumSize=,minimumSize=,preferredSize=,closable=true,defaultCloseOperation=DISPOSE_ON_CLOSE,desktopIcon=javax.swing.JInternalFrame$JDesktopIcon[,0,0,160x26,invalid,hidden,layout=java.awt.BorderLayout,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.BorderUIResource$CompoundBorderUIResource@4391f0,flags=8,maximumSize=,minimumSize=,preferredSize=],frameIcon=,iconable=true,isClosed=false,isIcon=false,isMaximum=false,isSelected=false,maximizable=true,opened=false,resizable=true,rootPane=javax.swing.JRootPane[,0,0,0x0,invalid,layout=javax.swing.JRootPane$RootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true,title=soapUI Starter Page]
java.lang.Error
 at javax.swing.UIDefaults.getUIError(UIDefaults.java:711)
 at javax.swing.MultiUIDefaults.getUIError(MultiUIDefaults.java:133)
 at javax.swing.UIDefaults.getUI(UIDefaults.java:741)
 at javax.swing.UIManager.getUI(UIManager.java:989)
 at javax.swing.JInternalFrame.updateUI(JInternalFrame.java:385)
 at javax.swing.JInternalFrame.<init>(JInternalFrame.java:332)
 at com.eviware.soapui.ui.desktop.standalone.StandaloneDesktop.createContentFrame(StandaloneDesktop.java:222)
 at com.eviware.soapui.ui.desktop.standalone.StandaloneDesktop.showDesktopPanel(StandaloneDesktop.java:417)
 at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:585)
 at com.eviware.soapui.SoapUI.showPushPage(SoapUI.java:1303)
 at com.eviware.soapui.SoapUI$3.run(SoapUI.java:800)
 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
java.lang.InterruptedException
 at java.lang.Object.wait(Native Method)
 at java.lang.Object.wait(Object.java:485)
 at com.passlogix.vgo.ho.EventDispatchRunner.runAndWait(EventDispatchRunner.java:83)
 at com.passlogix.vgo.ho.EventDispatchRunner.runAndWait(EventDispatchRunner.java:48)
 at com.passlogix.vgo.ho.WindowScanner.getFrameTitle(WindowScanner.java:408)
 at com.passlogix.vgo.ho.WindowScanner.run(WindowScanner.java:474)
java.lang.InterruptedException
 at java.lang.Object.wait(Native Method)
 at java.lang.Object.wait(Object.java:485)
 at com.passlogix.vgo.ho.EventDispatchRunner.runAndWait(EventDispatchRunner.java:83)
 at com.passlogix.vgo.ho.EventDispatchRunner.runAndWait(EventDispatchRunner.java:48)
 at com.passlogix.vgo.ho.WindowScanner.run(WindowScanner.java:485)
UIDefaults.getUI() failed: no ComponentUI class for: javax.swing.JCheckBox[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.0,border=,flags=0,maximumSize=,minimumSize=,preferredSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBorder=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,rolloverSelectedIcon=,selectedIcon=,text=Accept compressed responses from hosts]
java.lang.Error
 at javax.swing.UIDefaults.getUIError(UIDefaults.java:711)
 at javax.swing.MultiUIDefaults.getUIError(MultiUIDefaults.java:133)
 at javax.swing.UIDefaults.getUI(UIDefaults.java:741)
 at javax.swing.UIManager.getUI(UIManager.java:989)
 at javax.swing.JCheckBox.updateUI(JCheckBox.java:211)
 at javax.swing.AbstractButton.init(AbstractButton.java:2149)
 at javax.swing.JToggleButton.<init>(JToggleButton.java:159)
 at javax.swing.JCheckBox.<init>(JCheckBox.java:157)
 at javax.swing.JCheckBox.<init>(JCheckBox.java:133)
 at com.eviware.soapui.support.components.SimpleForm.appendCheckBox(SimpleForm.java:170)
 at com.eviware.soapui.actions.AnnotatedSettingsPrefs.buildForm(AnnotatedSettingsPrefs.java:85)
 at com.eviware.soapui.actions.AnnotatedSettingsPrefs.getForm(AnnotatedSettingsPrefs.java:54)
 at com.eviware.soapui.actions.SoapUIPreferencesAction.buildDialog(SoapUIPreferencesAction.java:143)
 at com.eviware.soapui.actions.SoapUIPreferencesAction.show(SoapUIPreferencesAction.java:109)
 at com.eviware.soapui.actions.SoapUIPreferencesAction.actionPerformed(SoapUIPreferencesAction.java:103)
 at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
 at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
 at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
 at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
 at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
 at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
 at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
 at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
 at java.awt.Component.processMouseEvent(Component.java:6267)
 at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
 at java.awt.Component.processEvent(Component.java:6032)
 at java.awt.Container.processEvent(Container.java:2041)
 at java.awt.Component.dispatchEventImpl(Component.java:4630)
 at java.awt.Container.dispatchEventImpl(Container.java:2099)
 at java.awt.Component.dispatchEvent(Component.java:4460)
 at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
 at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
 at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
 at java.awt.Container.dispatchEventImpl(Container.java:2085)
 at java.awt.Component.dispatchEvent(Component.java:4460)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)