A quick question about Downloadthemall for Firefox for all the digerati here.

I used to use it if I wanted to save a bunch of images here for more detailed "analysis" back on my Mac. But it has stopped working. When i try to download an image all I get is "attachment.php". Does anyone know what the trick is. There are few instructions for how it works, and it did for years. But no more.
(Split videos in Firefox are a different matter and a total pain in the ass. But that's a Firefox thing. But could it be related?)