there, I recently downloaded the WPMU DEV to my website

Hi there,
I recently downloaded the WPMU DEV to my website at http://www.dagmarkhan.com
Since I have downloaded WPMU DEV, my top menu bar is not showing up properly.
The next issue is with another plugin i.e. Event Espresso, it is not displaying the content the way it was before.
I tried to activate Floating Social on my Blog but it wasn't showing up properly and had the areas hidden so I had to disable it.
Can you please get back to me about these issues.