accessing frequently used word or spreadsheet docs from task bar icon

I have Office 2013 and Windows 7

Until a few days ago, I was able to right click on the task bar 'Word' or 'Excel' icon, and a list of all my 'pinned' docs would appear. as well as recently used (but unpinned) docs.  I simply selected the one I wanted to work on and a click would open it.  That useful facility has disappeared since the OS was re-installed. Can it be reinstated?  And if so, how.