First way to change the first page(home)

To do that, on IGRP Studio, click "Application builder" [Fig. 1]

Then, click edit your application [Fig. 2]

Now it is just choose the page [Fig. 3]

Second way to change the first page(home)

The other way is on IGRP Studio, click edit page [Fig. 4]

And choose that page will be the home page [Fig. 5]