5.0.0.6: Cannot open About & License Key windows

DBVis 5.0.0.6, Windows XP SP2 (German), Java 1.5 This is the output of the Debug window when I try to select About... or License Key... from the Help menu: Exception in thread "AWT-EventQueue-1" java.lang.NoSuchMethodError: sun.nio.cs.StandardCharsets.aliasesFor(Ljava/lang/String;)[Ljava/lang/String; at sun.nio.cs.ext.ISO_8859_3.(Unknown Source) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at sun.nio.cs.AbstractCharsetProvider.lookup(Unknown Source) at sun.nio.cs.AbstractCharsetProvider.access$000(Unknown Source) at sun.nio.cs.AbstractCharsetProvider$1.next(Unknown Source) at sun.nio.cs.AbstractCharsetProvider$1.next(Unknown Source) at java.nio.charset.Charset.put(Unknown Source) at java.nio.charset.Charset.access$300(Unknown Source) at java.nio.charset.Charset$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.nio.charset.Charset.availableCharsets(Unknown Source) at com.onseven.dbvis.H.A.E.?(Unknown Source) at com.onseven.dbvis.H.A.E.(Unknown Source) at com.onseven.dbvis.H.A.E.(Unknown Source) at com.onseven.dbvis.S.A.?(Unknown Source) at com.onseven.dbvis.S.A.(Unknown Source) at com.onseven.dbvis.DbVisualizer.?(Unknown Source) at com.onseven.dbvis.DbVisualizer.access$1000(Unknown Source) at com.onseven.dbvis.DbVisualizer$23.execute(Unknown Source) at se.pureit.swing.xmlactions.DelegateAction.actionPerformed(Unknown Source) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.AbstractButton.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.menuDragMouseReleased(Unknown Source) at javax.swing.JMenuItem.fireMenuDragMouseReleased(Unknown Source) at javax.swing.JMenuItem.processMenuDragMouseEvent(Unknown Source) at javax.swing.JMenuItem.processMouseEvent(Unknown Source) at javax.swing.MenuSelectionManager.processMouseEvent(Unknown Source) at javax.swing.plaf.basic.BasicPopupMenuUI$MouseGrabber.eventDispatched(Unknown Source) at java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Unknown Source) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Unknown Source) at java.awt.Toolkit.notifyAWTEventListeners(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at com.onseven.dbvis.H.A.d.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)