The version of PowerPhotos you're looking for, 2.1.4 b1, is a specific beta build from Fat Cat Software. Here’s a short story about the life of a digital archivist using this exact tool.
: It is the successor to the popular iPhoto Library Manager. PowerPhotos 2.1.4 b1
: Created by Fat Cat Software to extend the functionality of the native macOS Photos app. The version of PowerPhotos you're looking for, 2