[two_fifths] Columns Issue

Firstly really useful plugin! I mostly use it for adding columns and other interactive components from the editor and usually works great…

…but, discovered today that your [two_fifths] (and [two_fifth] also) shortcode doesn’t map to the css. Regardless of the option it always translates it to:
<div class="two_fifths">
but in your css you only have:

.two_fifth {
	width:37.6%
}

https://www.ads-software.com/plugins/smpl-shortcodes/