Impossible to update this theme

Hi, First of all, I'm sorry about my english. I am having troubles when I apply the update of the Catch Box Pro theme in my site.It shows this messages: An error occurred while updating Catch Box Pro: Update package not available. The version I actually have in my site is 4.1 and I want to update to 4.2. How can I do that? Is there someone here ready to give me a little hand?