Sorry to dig this up but I recently found out about Docear4Word and finally got it working, using this Help here: Forums » Docear Support Forums » Bug Reports » Docear4Word wont install if .NET newer than 2.0 is already installed « Docear
Unfortunately, I have to write more and more Word documents and thus I need a solution which is fast and not as annoying as syncing .xml files 
It also looks like that Docear4Word is basically the only option for Word users if you do not want to use Word’s internal reference manager (which I think is awful).
There is also Bibtex4word but it looks even less maintained than Docear4Word.
It looks like Docear4Word is not maintained anymore and the same fate happened to Jabref4word.
So far, the old version of Docear4Word seems to work ok but I think it would be nice to get it working with recent .NET versions so it is installable out of the box on Windows 10.
I just downloaded VS and tried to compile it myself, but I ran into some dependency issues and my C# skills are basically not existing and I also have not the time and muse to work on it right now.
I don’t know how much work it is to get it up and running and compile for a recent version (including codesigning etc) but I would like to offer a bounty of 50€ to bootstrap the work.
Maybe if there is a working version for recent Windows Versions available, it would attract more users.