Select an image layer and run this script, the image is then opened in Gimp for editing. After you’re done the image gets updated to the edited version.

Installation: Place the script in your /scripts/menu/Image -foder.

With Linux it should work out of the box.

With Windows you may have to change the path to your Gimp-installation in the script if Gimp doesn’t start when you run the script. Just open it up with a text-editor and change the path where I’ve noted.