Here is how you construction the top section of the Diva purse.
Sew the zipper unit onto the purse side, right sides together and leaving the lining loose.
Unzip, turn purse inside out and sew on other side. Note: It might be better to not stitch across zipper so that you can keep it more open allowing for it to be easier to sew. I stitched across too soon which made it harder to get things together.
Now measure the half point that is about 2 and 1/2 inches about bottom of flap.
Center snap anchor and mark the slit lines. Snip on slit lines being careful not to make them too large.
Push prongs of snap through and smash flat.
Lay other flap on top and mark center. Then repeat last step so that other side of snap is in place.