Solid Construction Pro featured slider on home page

I bought the solid construction pro for https://usbolsburg.com (Union State Bank in Olsburg, KS). I work for Modern Banking Systems and part of my job is to develop websites for our bank customers. I bought this particular theme because it had a larger homepage slider. The slider is named "Demo". There is no way to access it or update it with the bank's images. The town of Olsburg is famous for their dala horses and barn quilts. The bank would like their website to have a community feel and the larger slider would be perfect. How do I make my images larger like the slider you show when I picked this new theme? Thank you. Patty Barone, Marketing Director, MBS