Transfer Upfront theme from one site to another

I want to transfer a theme from my development site to my live site. I've made all the changes to the theme so it looks nice in the development site, and am ready to move it.

On my live site, I already have posts and comments that need to be preserved, only the theme needs to be changed.

Is there a plugin to do this? Or should I grab the database options from the development site using:

select * from wp_options where option_name like '%upfront%';

select * from wp_options where option_name like '%spirit%';

And then paste those into my live site and change the theme to Spirit? I really don't want to botch the transition.

Thanks.