The DragAndDrop add-on by Javi Dominguez and collaborators is not an "official" add-on.  It's managed under GitHub, like many unofficial add-ons are.

The latest version is 2.0.1dev and can be downloaded from this page:  https://github.com/javidominguez/DragAndDrop/releases/tag/2.0.1dev 
The direct download link is:  https://github.com/javidominguez/DragAndDrop/releases/download/2.0.1dev/DragAndDrop-2.0.1dev.nvda-addon 

I don't know anything about this add-on beyond what I've written here.
--

Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041  

It’s hard waking up and realizing it’s not always black and white.

     ~ Kelley Boorn