IntelliJ not starting with OSX Mavericks

I just updated by version of OSX to use Mavericks to test my Java application and now find IntelliJ will not start

I then updated to the latest version (12.1.6) of IntelliJ and it made no differece, still doesnt work

I then tried using open from the command line as follows
         open -n "./IntelliJ IDEA 12 CE.app"

and got
     LSOpenURLsWithRole() failed with error -10658 for the file /Applications/IntelliJ IDEA 12 CE.app.

Trying to open the java 6 version of my applciation fails with the ame error

Java -version returns

macbook:Applications paul$ java -version
java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b43)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b56, mixed mode)

although before I updated to Mavericks I did do an Apple sofware update which updated Java to 1.7.0_65 so Im unsure why it doesnt show that version.

(I also have a version of Java 7 installed within my application, and that application using Java 7 starts okay)