recover/open domain site file

until the other day, I normally used iWeb even if it's not longer supported, then, I decided to wipe my Mac.

now I have recovered iWeb app via Time Machine with its domain file (my web site), so I can open the app but the website is gone, it has several Mb of weight so something is in there but when i click on it, in iWeb I have the select layout page.

my question, is there a way to continue to open my website with iWeb (and how to do it) or is there a program that can open this file so I don't have to start from zero...it would be a disaster..and impossible!!

thanks