I have an iPad Pro and Mac Book Pro, both have been updated to the latest versions of Art Rage and OSX. I want to back up the ptg files to the computer.

I open the painting and select the export button on the bottom, select ptg, select iTunes. This works and I can save the file to the computer.

The problem is that doing this deletes the painting from Art Rage. In effect, this is doing the exact opposite of backing up and is very worrying.

The problem is not immediately apparent, but if I then click "edit" on the painting nothing happens. If exporting a png, it doesn't work. If going back to the gallery, the painting still appears there, but if opening another painting and editing it, then going back to the gallery, the first exported painting is gone.

How can I export the ptg file to iTunes without deleting the painting from the gallery?