Crashes when around 1000 or more duplicates are found.

Great program, but useless when about 1000 or more duplicates are found which crashes the program.
It also fails to check if the duplicate photo is in a read only folder. No warning is given to the user that it won’t move the duplicate photo to the trash. But instaead gives the appearance that the photo has been deleted when it really didn’t.

Rickn7 about Photos Duplicate Cleaner, v1.7