After entering Filename on the last screen, if you then Choose Destination, the Filename reverts to Untitled. Surely it should stay as you set it?
Maybe I’m just being picky, it’s still a good App.
I will check the bug. Thanks for the feedback. 
This still happens…
Hello there,
I just checked, and the previous bug has been fixed.
I think that the new behavior is because you did not tap on the enter key to validate the changes before clicking the destination button.
I agree that it would be better if you did not have to. I will update the app for that point.