Help with jemplode on Kubuntu please

I am trying to get jemplode 70 running on Kubuntu 5.04 via the command line.
All I can get is the splash screen and the following output:

java.lang.NullPointerException
at org.jempeg.empeg.manager.EmplodeUI.EmplodeUI (EmplodeUI.java:242)
at org.jempeg.empeg.manager.Main.start (Main.java:83)
at org.jempeg.empeg.manager.Main.main (Main.java:133)
at java.lang.VirtualMachine.invokeMain (VirtualMachine.java)
at java.lang.VirtualMachine.main (VirtualMachine.java:92)


Any ideas please?