I just downloaded and tried that beta version with no joy - the problem still exists.

I am using the AppStore version on a iMac 5k if that makes a difference. Are there any prerequisites in terms of Java that are missing - I originally assumed your desktop version packaged its own Java version but maybe I was wrong?

I too have never seen such a problem, but again I don't run a lot of Java based applications on my iMac 5k either.

Any other ideas or suggestions?