Huh?

Just bought this app, imported a photo, and cant figure out how to use it. Seems to twist the photo without making any real correction. No "back" button so once you do something you are stuck. No help from the developer as the information button leads to an error page. Wish I could undo the button I pushed to buy this turkey.

Botticelli912 about Perspective Correct - Fix distortion and skewed pictures with keystone and straighten correction from camera or photo library