WordPress Mobile Edition Plugin

I’m using WordPress Mobile Edition 2.0. When I view my site at https://designninjas.com on a mobile browser it works just fine, the only problem is, when I click the link at the bottom that says “Exit the Mobile Edition” it will not switch back to the normal theme. It worked at some point, but I’m not sure when it changed. I did upgrade to the latest WordPress recently, so that could have been it. Any help would be appreciated.