[Plugin: Dynamic Headers] Want to centre header rather than right align

Hello.

I have installed this plug-in fine (so it seems), but have the issue of the header right-aligning rather than remaining in the centre of the page, where I want it.

Does anyone know how to fix this? I have basic coding knowledge but obviously this goes over my head. Any assistance would be greatly appreciated.

Thanks.

https://www.ads-software.com/extend/plugins/dynamic-headers/