Changing Google Maps API Key?

Hi,

I have duplicated one of my PP Directory sites onto another domain.

As such I need to change the Google Maps API Key to get the maps working again – but the field used to do this [Google Location & Google Maps] is not visible anymore. Presumably because the original API key for the other domain is still entered in the database somewhere.

So how do I now change the API key for the new one required for the new domain?

Thanks.