Take a closer look at the screenshot of https://imgur.com/a/AT5uZfk

Only the game icons are put there, not the DLCs themselves (they are placed correctly).

Maybe it has something to do with the makeFilepath method in gamedetails.cpp, where there is a special treatment for these extra files?

https://github.com/Sude-/lgogdownloader/blob/0bae0c2160f7c2a8d9dbbcf38f9e542e18661cf7/src/gamedetails.cpp#L80

I was wondering why it was only those files but couldn't find anything wrong with the code that makes the file paths.
Then I noticed that I forgot to handle some of the new details when saving/loading the cache.
Should be fixed by 37788ab

37788ab Fix cache usage and add gamename to logo, icon and product json filenames