Force face recognition in a directory Adobe Photoshop Elements 18.0.0

Hi, 

I just began with Adobe Photoshop Elements 18.0.0.

I have a large Directory with many sub-dirs with fotos, about more than 100000. 

It seems that the face recognition has scanned many of the folders, but even some are not still covered, although the process stopped obviously.

What can I do to force the face regognition in ALL folders? Or trigger the face recognition process once again.

Regards AA4

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