[Plugin: Zingiri Web Shop] how to customized or even edit the registration forms?

how to customized or even edit the registration forms?

because i just need only 4 fields.. name, tel, email and the address..

Please help, been trapped with this for the past 4 days already, and im not making any progress..

Thanks in advance

https://www.ads-software.com/extend/plugins/zingiri-web-shop/