How to delete broken screenshots?

[[BRE] Léonard "le Fol"]

I have manually touched I think, I am sure actually, the pictures in the folder and ... well now the load as "X" images, so meaning that they are broken.
How to solve this? Is it possible to have a system that removes the broken images?
Thanks.

EDIT: I searched on the steam search, but haven't found anything that responds to this.

[im0nit]

Go to 'screenshots' folder. You can see 'thumbnails' folder.

Copy all thumbnails from 'thumbnails' folder to 'screenshots' folder.

*** DON'T OVERWRITE. AGAIN. DO NOT OVERWRITE. ***

Open screenshot manager.

Now you can see blurry low-res screenshots that you manually deleted.

(If you already deleted equivalent thumbnails before then vdf editing is only way I think.)

Good luck.

[[BRE] Léonard "le Fol"]

Yes I already deleted the thumbnails.. So there is nothing there. Of course I would not be able to overwrite as I deleted everything a month ago before now asking this question.
Thanks for your advise. I am testing it now.

Sure if I overwrite I would substitute the Screenshot with thumbnails.

EDIT:

I tried, it doesn't work, there is nothing to overwrite.. there is nothing that changes... screenshot that are broken should be cleaned by themselves with a Screenshot mechanism syhstem that realizes the files do aren't there ahymore.