You can try my fix as described below:
I did these steps and it seems have (temporarily) fixed the saving problem for me:
- Run word as administrator (Shortcut > Compatibility > 'Run as Administrator)
- Start Word and then go to File > Options > Add-ins,
* Under manage tab ''Manage: COM Add-ins'' GO
* Deselect all add-ins and then type Ok.
- Restart Word
Now when I click on 'Browse' it pops us the window, just as normal.