Pro Sites Pricing Table Descriptions

I am using the Pro sites plugin and trying to modify the featured pricing table. However, I am unable to change empty description areas as seen in red in this screenshot. I double click the area, and nothing happens. Description areas with text can be modified, but if I remove the text then I can no longer modify the descriptions again.

https://www.dropbox.com/s/gw2bm0tqdtoppm7/Screenshot%202016-12-10%2001.40.46.png?dl=0