Thats Steven, that does the trick. 

P

Hi Peiman,

With Blue closed, try doing this in a terminal:

rm -r ~/Library/Application\ Support/blue/dev/

There seems to be an issue with Netbeans RCP applications when
migrating from platform 7.2 to 7.3 (which the new releases do). I
think it's causing these crazy configuration errors.

After removing that folder, Blue should start up again correctly
though you'll likely have to reconfigure Blue again.

Give that a try and let me know how that goes.

Thanks!
steven

On Fri, Aug 30, 2013 at 6:01 AM, peiman khosravi