DbVisualizer Personal 7.1.5 Error after upgarding Java

Hi, After upgarding Java (Version 7 Update 9), I receive the following error everytime I start the application then I have to shutdown it. Any suggestions are welcome ! Thanks. Phil ----------------------------------------------------- An internal error occurred in: java.lang.ClassCastException: javax.swing.KeyStroke cannot be cast to java.lang.Comparable The error may have affected the application state. Please notify vendor. Stack Trace: java.lang.ClassCastException: javax.swing.KeyStroke cannot be cast to java.lang.Comparable at java.util.TreeMap.compare(Unknown Source) at java.util.TreeMap.put(Unknown Source) at java.util.TreeSet.add(Unknown Source) at com.onseven.dbvis.K.F.a(Z:2731) at com.onseven.dbvis.V.A.H$B.<init>(Z:3492) at com.onseven.dbvis.V.A.H.<init>(Z:210) at com.onseven.dbvis.V.C.?(Z:348) at com.onseven.dbvis.V.C.?(Z:732) at com.onseven.dbvis.V.C.<init>(Z:3052) at com.onseven.dbvis.V.F.a(Z:3093) at com.onseven.dbvis.V.F.<init>(Z:217) at com.onseven.dbvis.DbVisualizerGUI$2$1.a(Z:1870) at se.pureit.swing.A.O$2.run(Z:1192) at java.lang.Thread.run(Unknown Source) System Information: Product: DbVisualizer Personal 7.1.5 Build: #1590 (2011/02/24 17:23) Java VM: Java HotSpot(TM) 64-Bit Server VM Java Version: 1.7.0_09 Java Vendor: Oracle Corporation OS Name: Windows 7 OS Arch: amd64 OS Version: 6.1