Sorry for the delay – this one required some research and thought. Here it is the solution for the problem being faced by you.
Pls paste the following into the js/main.js file. I will have this change in the upcoming update so that you do not have to repeat it.
$("ul.tabs a").click(function () {
$('.carouselslider-container .flexslider').each(function () { $(this).data('flexslider').setup()});
});