Hi Damian,
Our plugin is capable of just 5 columns currently. However with some css customization. It can be changed to any number you want.
For that, please set the column as 5 and then keep this css in your style sheet.
#wmle_container.wmle_container .wmle_item_holder.col5{width:XXX%}
Here XXX should be 100 divide by no of columns.
Thanks