@Anonymousokay, now we're getting somewhere...
When you build a sample template App, they almost always have an Excel file as their data source.
In that template, when you went to build the app, it asked you where you want to put your data. Usually this is where it will then put the Excel file you will be working with.
HOWEVER, that particular App does NOT write-back any data to any place - It uses an Excel import of data. In fact, it doesn't even provide the Excel source file that it derives from (that I can tell). So, I'm actually wondering how you customized it without that source.
From what I see in the App, it gathers responses from the screens, but does nothing with it at the end.
It is really more of a "show case" App than a functional App.
So, if you really want to do something, you need to connect to some data source that you can write to and store the Responsecollect Collection that it gathers through the process.
Hope that gives you some place to start.