If they aren't on your backup (and you know how to restore them) they probably are gone forever. Luckily, it's not too difficult to make them again.
I have a Toshiba Laptop running windows 7. I use Office extensively and one feature that I appreciate is the Jump list when you right click on a word or excel icon. I installed Windows 10 and then went back to Windows 7 and now the jump lists are not there. What happened and how can I reactivate the jump lists.