Open a file folder and type in the following and press enter
%LocalAppData%\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets
copy those files to other folder and rename them to .jpg files. (they have file header JFIF (JPEG File Interchange Format))
You can run the following in copied files location
ren * *.jpg
and you will see those beautiful pictures 🙂