I also didn't know that for a long time and only found it by chance. xD
Now I wonder if there's a DA-App on the Microsoft store for PC....
Yep, here: www.microsoft.com/en-la/store/…
You could download this for free and see if it's the same there.
It should be there, when you go on your page, one of the last menus to click on.
You need a microsoft-account to download, though. :/
Google-Playstore on Smartphone or Tablet is waaay easier to get imho.
But that's all I know about it.
Another option (but without the handy possibility of being able to just use one click to add a watch) would be the list of your watchers.
I'm gonna PM you the code, since it's pretty easy to see everybody's watchers once you have that and it's probably not so nice to just post that publicly... ^^|||