Updating to the latest java has fixed it here (its launching).
I have been holding off updating Java as the Processing site recommends not to "Java 1.5 — the very latest version of Java. We don't support it and recommend that you avoid using it, as we don't test with it and it appears that it may be the slowest (certainly most bloated) release of Java yet."
FYI console log said
[JavaAppLauncher Error] CallStaticVoidMethod() threw an exception
Exception in thread "main" java.lang.UnsupportedClassVersionError: processing/app/Base (Unsupported major.minor version 49.0)
followed by many lines of related errors
Thanks for quick reply
Cheers
Nick