"Elements+" (hereinafter, "E+") is an add-on that powers up Adobe Photoshop Elements (hereinafter, "PSE"). To install it automatically:
- Mount Elements+ disk image (i.e., open "elements+13.dmg" file).
- Double-click "Setup" package file.
- Start Photoshop Elements Editor and wait for the mediadatabase to rebuild.
NB Alternatively, you may setup Elements+ manually as explained here.