Directory Theme translation help

The above site is my directory. I am using Directory Theme 1.0 por Tammie Lister, Ivan Shaovchev (Incsub)

How can I change the following texts into spanish

1. What can we find for you today?
2. Find It Now button.
3. Welcome, what would you like to do?
4. Sign Up button. Also how can I change the URL for this button

I looked under wp-content/themes and there is no folder for the Directory Theme

Where could I find it to make the necessary changes?