How to Update Mobile Site to Latest Version of jQuery

I built a mobile app last year ( http://www.vivavienna.org/app/) using the jQuery framework. I see from the website that the framework has been updated but I'm not clear on how to upgrade the site to the latest version. Do I need to recreate the site starting with a new multi-page template, or can I just upload the folders with the latest jQuery files?

thanks for reading and help