Alex,
I was able to download the installation files for R&H (which ever version) then when you unpack it and start the installation you can just grab the Event Editor application files that would have gone into IIS. Then you can add the files to IIS and have the most recent config.json files for event editor.
Do not install the apps for server or desktop otherwise they will no longer work. You want just the IIS files for event editor.
I am sure there is a more eloquent way to say what I said. If it doesn't make sense I think I might have some screen shots from when I did it a few months back.