I got corrupted error probably from stopping the download/restarting it multiple times.
I deleted the entire folder, cleared cache, went through and deleted agent files, any random D3 reference in any folders in programdata/appdata etc.
I also went through my registry and deleted anything that had "D3" or "D3beta" in it.
My computer clearly things that I still have the install files on my computer. How do I override it to stop thinking this?