[Theme:Storefront] Cannot centralize logo

Hi,

I am running the Storefront theme and I have installed the Storefront designer plugin. Just less than 2 weeks ago, the logo was still centralized; and suddenly the plugin just does not work anymore. Could it be due to the new WordPress updates?

Would appreciate if someone can take a look at my site at http://www.integratedriding.com. Thank you.

Regards
Rachel