Problem with placement of page buttons

Hi everyone. I am running Liquorice 1.5.7 by Nudge Design. I do not know how to manipulate the pages menu (the one on the top which has buttons linking to various pages within the site) so that the buttons are in the center. They currently are all over on the left side.

Home | The Blog | About | Contact — this is how it currently looks

Home | The Blog | About | Contact
— This is how I would like it to look.

Any suggestions would be most appreciated. This is the only problem I am having with the theme so far. Thanks very much.