Column-Matic version 1.2 includes the missing text-align css shortcode attribute. Since shortcode attributes may not include a dash (also known as a minus sign) the actual name of the attribute is text_align. Naturally, the best way to style a column is to use classes. However, if CSS is beyond one’s confort level, text alignment may also be assigned as follows:
[column text_align="justify"]content[/column]