The following error is generated when trying to create a new project in Tibco Designer. The empty project cannot be created and also recently opened projects can not  be browsed in the TIBCO Designer startup window:

java.lang.NullPointerException
    at java.util.Hashtable.put(Hashtable.java:459)
    at com.tibco.net.CGI.parseDataInto(CGI.java:330)
    at com.tibco.ae.tools.designer.RecentProjectsRegistry.remove(RecentProjectsRegistry.java:77)
    at com.tibco.ae.tools.designer.RecentProjectsRegistry.documentOpened(RecentProjectsRegistry.java:136)
    at com.tibco.ae.tools.designer.AEApplication.fireDocumentOpened(AEApplication.java:3245)
    at com.tibco.ae.tools.designer.AEApplication.newDocument(AEApplication.java:2671)
    at com.tibco.ae.tools.designer.AEApplication.newDocument(AEApplication.java:2583)
    at com.tibco.ae.tools.designer.AEApplication.newEmptyDocument(AEApplication.java:2909)
    at com.tibco.ae.tools.designer.actions.NewEmptyDocumentAction.performAction(NewEmptyDocumentAction.java:38)
    at com.tibco.ae.designerapi.actions.GenericDesignerAction.actionPerformed(GenericDesignerAction.java:300)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.java:6525)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6290)
    at java.awt.Container.processEvent(Container.java:2234)
    at java.awt.Component.dispatchEventImpl(Component.java:4881)
    at java.awt.Container.dispatchEventImpl(Container.java:2292)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
    at java.awt.Container.dispatchEventImpl(Container.java:2278)
    at java.awt.Window.dispatchEventImpl(Window.java:2750)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.awt.EventQueue$4.run(EventQueue.java:729)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
    
    The faulty file is attached. (Filename: Designer5.prefs).