How to get the full file path of the opened document

Well this seem trivial
but some how Musescore2 is 'successfully' hiding the path of the current document.

I used 'Open recent' to successfully open a file like to copy its full path so I can upload it.
However I can't get it. I tried
File/Info... (what sounds a little like ' File/properties' where you normal find such things)
File/Save as and Open but these also don't reveal the path of the current document.
right click on the document tab <-Nothing (would be nice if that'll bring up some context menu with 'close all but this' and 'Copy full path' and maybe 'Rename' )