Just upgraded LibreOffice, and I normally runn Write and Calc pinned to the Win10 taskbar, with my "commonly used files" pinned to the taskbar icon right click popup.
But every time I update LibreOffice the old taskbar pins are invalidated - so I have to create new ones - and the pinned files list is of course empty on the new icons. 
This is really quite annoying, especially as I forget to make a complete list every time I update...

The list of pinned items is easy: 
%AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar
And the pinned files (jump list):
https://msdn.microsoft.com/en-us/library/windows/desktop/dd940347(v=vs.85).aspx

Please do something with this: I can't be the only person who is frustrated...