It was not possible to implement because apps are separate.
In iOS app doesn't have access to folders from other apps.

To open documents from the old ArtStudio you have to export it to PSD, then import PSD in Artstudio Pro.
We consider adding option to open files from old ArtStdudio - but it will not work automatically.

Can only export PSD’s ftom old art studio via mail or itunes. The one I tried mailing was too large an attachment. Ismy only option to back up via itunes?