You can manually select/add artwork perhaps. But I haven’t tried that.
Since my first MediaElch (2.0.1.zip = 2013-12-16), collection arts are manually added to the folder and when not automatically appearing in the UI, selected by clicking and choosing local image.
I think the TMDb Scraper for Collections never worked. So for my use, no problem.
< But then I think there won’t be any way for tmdb scraper to find the collection on tmdb to download artwork.
If in the UI to make the Collection Scraper, there is an editable text box with the search terms (original title or local title or TMDb ID), just as there is in the Movie Scraper UI, then I have no problem either.
I can tell a lie to TMDb, say that my collection is called Hobbit, when in fact it is called Middle-Earth. Or just enter the Hobbit Collection ID, id121938.
If that is not possible, well, we will do everything manually.
You might want to put in the UI that makes the Collection Scraper a button that, when pressed, updates collection data in the NFO of all movies that belong to this collection.