A child theme is the safest and easiest way to modify an existing theme, whether you want to make a few tiny changes or extensive changes.
Hi, BW WordPress theme just update the new version to 4.1. The update at Saturday (Dec 16, 2013) already aproved by WordPress theme reviewer (see http://themes.trac.wordpress.org/ticket/15284) and now the self-hosted WordPress users can download it free from the WordPress theme directory.
In this new version we have not much changes. It just fixed some style, especially the blockquote style. Removed some files that not use again, like color-option.php. Another fixed code was on header.php.