That's a nice improvement.
I always liked the clean simple interface but changing to the more standard minimise and close has simplified things even further and I like the way you've moved the shutdown option to the main interface.
ImgBurn seems to work perfectly too.
One small display glitch though.
If a user changes the skin to 'none' then there aren't any icon graphics shown.
I'm a beta tester for other programs so I do tend to play around with all the settings.