The numbering is confusing, but the "Unreal Editor 2.1: Extended Standalone Edition" is the UT99 UEd 2 plus a few tweaks and useful addons.
I often recommend using it so you have a clean mini install to edit with so you don't get weird behaviur due to mods and updates to your main game.
Many people install 2 copies of UT for this, but it is a bit over the top.
I got it originally from the old HoF site. There should be a capture of the original page in the web archive but I can't find it.
The current URL works without Ws https://hofgamingclan.com
, but is a fresh install not an import of the old site.
It is safe to install and use. It is a regular self extracting archive so you can easily inspect the contents without installing it.
You may find UT-Files is a faster source for downloads and tends to be up when you want ithttp://ut-files.com/index.php?dir=UEditor_Developing/
It is NOT Unreal 227 UEd 2.1, so it does not have the new import/export options