
The Steam Workshop is a great way to add new content to an older game. Options include rating the Workshop item, putting it in your favorites, or unsubscribing from it completely. From this page, you can access and manage your subscribed items.You can navigate the list using the navigation arrows below and select the number of items shown on each page.On the menu on the right, select “Subscribed Items.” You can choose to sort the items, either by name or date of subscription, creation, or latest update.Click on “Your files” below to open a new screen.In the Workshop screen, scroll down until you find “Your Workshop items” on the right-hand side.Hover over or select Community from the menu on the top, then select Workshop from the dropdown menu.


This is nothing to do with Steam Downloader and the API, and everything to do with the publisher of the game not enabling those who don't own the game on Steam to download workshop mods. In the past the steam workshop used to use a different system where the game itself would download mods using an API, which I think is what that steam workshop downloader is trying to use. It all goes through the steam client now.


"I think it's not actually possible to use a downloader for newer steam workshop stuff, because it uses the same download depot system for mods as for games. Guess GOG users are not allowed to use mods for that game. "The game that this item belongs too does not allow downloading of its items" on for some games like Hat In Time, you're fucked
