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Navigate to this folder and delete what you need
%APPDATA%\Microsoft\Windows\Recent\AutomaticDestinations
Now you will see a list of files with very long and convoluted names. This is because they are all encoded. Each one represents a list of recent items for a particular jumplist.
It’s impossible to tell which entries go with which jumplists unless you open the file in a text editor and browse through. However, since all of the files are just recent items in a jumplist, you can delete all the files and it will clear all recent items on all jumplists.