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In your front-end? In your WordPress administration?

Can you provide a URL, please?

This is a premium theme issue, and the WordPress forums are not the right place to handle these types of issues.

I would look at:
http://www.templatemonster.com/help/

And then contact them, seeing as you spent a good chunk of money investing into their theme.

Then roll back changes you know you’ve made in the last week until you figure out the culprit.

I wish I could help more, but I’m not knowledgeable enough on this theme to proffer any advice. I don’t wanna steer you in the wrong direction.

But with a theme you supposedly paid $75+ for (if you paid ’em), you should receive near instantaneous support for issues just like this.