Eduardo,
Sorry for the delayed response to this.
I'm not sure what's happening in your admin area. Can you clear your Joomla cache and even your browser cache to make sure our updated Javascript and CSS is being loaded properly. If that doesn't work, please try from a different browser to see if that helps. In general, it simply looks like our assets aren't being loaded, but I'm not sure why that would be.
I hope that helps, but keep me posted if you still have issues.
Thanks,
Alex