java.lang.NullPointerException
   at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.prepareContent(SettingsTab.java:459)
   at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.modelOrSelectionChanged(SettingsTab.java:486)
   at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.valueChanged(SettingsTab.java:434)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164)
   at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
   at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:405)
   at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:415)
   at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:459)
   at org.netbeans.modules.autoupdate.ui.SettingsTab$1.run(SettingsTab.java:209)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.netbeans.modules.autoupdate.ui.Utilities.startAsWorkerThread(Utilities.java:725)
   at org.netbeans.modules.autoupdate.ui.Utilities.startAsWorkerThread(Utilities.java:710)
   at org.netbeans.modules.autoupdate.ui.SettingsTab.addNotify(SettingsTab.java:204)
   at java.awt.Container.addImpl(Container.java:1114)
   at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:724)
   at javax.swing.JTabbedPane.add(JTabbedPane.java:858)
   at org.netbeans.modules.autoupdate.ui.PluginManagerUI.postInitComponents(PluginManagerUI.java:522)
   at org.netbeans.modules.autoupdate.ui.PluginManagerUI.access$000(PluginManagerUI.java:79)
   at org.netbeans.modules.autoupdate.ui.PluginManagerUI$1.run(PluginManagerUI.java:132)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)