How to rename my Power Line A/V Wi-Fi Extender

Hi,

My ISP as replaced my Router and it works ok.

Only now I have two SSID names.  One for the new Router and another for the existing Wi-Fi Extender.

I would prefer to rename the Extender with the same name as the new Router.

I have searched and can't find a solution.  My ISP cannot help.

I have downloaded the Netgear Genie but can't find a way how.

Any Ideas.

Thanks.

wyko