WordPress 3.9: Shortcodes Button Missing Fix
In WordPress 3.9, TinyMCE, is updated from TinyMCE3 to TinyMCE4. To fix this, simply download the latest version of the theme, v3.5.2 as of July 25th, 2014, from your ThemeForest account.
Note 1: After this is done, clear your browser cache and clear any kind of server and plugin cache.
Note 2: Shortcode dev mode will no longer work due to TinyMCE update.