I want to remove the "extras" for my game from being purchasable for a while. If I click the "hide this file and prevent it from being downloaded", I assume it will hide it from the main game's page, but it won't hide it from a user's download page if they purchased it before I hid it. Is that correct?

Hello, sorry for not getting back sooner. That option will completely hide the file from everyone. No one will be able to download it while it is hidden.

Ok, thanks!