[Plugin: Catablog] Setting the number of columns that show on page

Hi all, I posted yesterday but didn’t have much luck.

I’ve recently taken over running a website for my new employer. The previous designer used catablog as an easy way to list our products online. It worked great until yesterday morning I noticed that it was showing in 2 columns on page rather than 3. This makes some of our pages extremely long because they list 100+ products. Is there a way I can fix this? For a visual representation, here is one of the pages in question.