Trying to redownload UDK

I’m trying to reinstall the Unreal Development Kit UDK because I remember using that when I was trying to mod Dungeon Defenders and it had a really neat level design style that started with subtracting space from the existing assumed solid area. I’ve been trying to find other types of subtractive modeling software like that because Blender is not nearly as smooth for doing a similar workflow, but I haven’t found anything yet.

So I tried to reinstall UDK via Steam, and all I get is an empty folder with a readme file telling me to go to an external website. Feels very CreepyPasta