JIRA 6.2 Configuration Tools Throws Error When Trying To Load Database Configuration From New Home Directory

Steps to reproduce:

1. install JIRA 6.2 milestone (EAP)
2. run the config.sh
3. click on "Yes" when prompt with "Would you like to reload the DB configuration from the new JIRA Home?" as in the screenshot below
   
4. JIRA throws the error in Terminal:

   janetalbion@janetalbion:~/supportinstance/jira/jira62m/atlassian-jira-6.2-rc1-standalone/bin$ sh config.sh
   Loading application properties from /home/janetalbion/supportinstance/jira/jira62m/atlassian-jira-6.2-rc1-standalone/atlassian-jira/WEB-INF/classes/jira-application.properties
   Reading database configuration from /home/janetalbion/supportinstance/jira/jira62m/home/dbconfig.xml
   Reading database configuration from /home/janetalbion/supportinstance/jira/jira62m/atlassian-jira-6.2-rc1-standalone/bin/dbconfig.xml
   Exception in thread "main" java.lang.NullPointerException
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame.checkForJiraHomeChange(ConfiguratorFrame.java:921)
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame.access$100(ConfiguratorFrame.java:55)
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame$2.stateChanged(ConfiguratorFrame.java:153)
   	at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
   	at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
   	at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
   	at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
   	at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
   	at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
   	at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:731)
   	at javax.swing.JTabbedPane.addTab(JTabbedPane.java:798)
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame.newTabbedPanel(ConfiguratorFrame.java:156)
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame.init(ConfiguratorFrame.java:95)
   	at com.atlassian.jira.configurator.gui.ConfiguratorFrame.<init>(ConfiguratorFrame.java:83)
   	at com.atlassian.jira.configurator.Configurator.startGui(Configurator.java:74)
   	at com.atlassian.jira.configurator.Configurator.start(Configurator.java:52)
   	at com.atlassian.jira.configurator.Configurator.main(Configurator.java:43)
   
   

Environment tested:

• OS: Ubuntu 13.04
• Oracle JDK 7
• JIRA 6.2 TAR GZ

Extra note:

• cannot reproduce this ERROR when trying to install a new JIRA 6.2 using the ZIP in the same Linux server