This is a grey area. The FitGirl repack contains copyrighted code owned by Ubisoft. However, many users on the r/CrackWatch subreddit argue that the is difficult to legitimately download if you own the base game via the Epic Games Store (which sometimes fails to trigger the DLC download). Consequently, using the FitGirl repack to extract only the HD files and paste them into a legitimate Steam/Ubisoft install is a common workaround.