Vendors Product list showing only one product per row

Hello. I would Appreciate your help.

I am having trouble with the way of how the products list displays in a vendor site.
It only shows one product per row. I would appreciate your help to solve the problem and show 3 or 4 products per row.

I already paid for the theme so I would appreciate your help.
THanks!

The page I need help with: [log in to see the link]