This app is THE SOLUTION

This app solved the connondrum faced by old Aperture / iPhoto users who had 3rd party applications to edit photographs. I can use any editing software such as Nik, ON1, Photoshop, etc. and all the edits will be saved in my Photos library!!!
This app is just amazing and the price makes it totally worthwhile. I hope it stays around for ever!

el Chubasco about External Editors For Photos