Can I search on (and eventually remove) photos that are not available?

[Couscous]

Can I search on, and eventually remove, photos that are not available? 

I am trying to cull my photo library in various ways, such as removing duplicates. Since Excire Foto does not appear to have the feature, I am resorting to other methods. When I do that, and remove the photos from the hard disk, they still show up in Excire Foto, but are marked as "Not available"
   

[Couscous]

Can I search on, and eventually remove, photos that are not available? 

I am trying to cull my photo library in various ways, such as removing duplicates. Since Excire Foto does not appear to have the feature, I am resorting to other methods. When I do that, and remove the photos from the hard disk, they still show up in Excire Foto, but are marked as "Not available"

I found a good enough solution. If I re-synch the folder, there is an option to remove unavailable photos! Works for me. I would still like to know how to find them first...