NOPCOMMERCE 2.5 NO SOURCE- Where is Masterpage.aspx?? can not find this HELP PLEASEE

have just one question for you who are familiar with nopCommerce shops,
I have designed a template for nopCommerce I must slice and code in, but I can not find (master-page wrapper.aspx) file, under all the folders?? through which the file contains all the div header and body, etc.,
but when I'm on firefox opens developer tool (F12) and click RIGHT and look closely at the code you will see it! ',
but it's not the subfolders? very interesting side they have developed ..
I will enter and change the title and footer and add new Diver and program a little C # plugins .. I downloaded the latest version "nopCommerce 2.5" no commerce ... So I hope some of you have been and messed around with it to guide me through. Thanks in advance

i can not find the aspx file. Header body title file help me PLEASE

There is no masterpage.aspx in 2.5.  Version 2.5 is using MVC with Razor, so the file you need to look at is

Presentation/Nop.Web/Views/Shared/_Root.cshtml

thank you that was

Views/shared/footer.cshtml
Views/share/head.cshtml
and other other ......