Web Project starting with index.htm from another project

I have a web project that starts with the index.htm file from a separate project, an earlier version of my current project. I am using git and cloned a new branch from github for my current project. But it looks for the index.htm file of a previous branch project. How do I change the setting. If I debug the index.htm file in my current project it loads just fine. But not when I used the PHPBuiltInWebServer.