This is unfortunately the second time this has happend, but everything from my Hierarchy, Game and Scene have gone missing. They were perfectly fine when I opened them on Windows 7 but now that I’ve upgraded to Windows 10 this has happened. I tried deleting the library from the back-up and opening it and still nothing… I really do not want to make the level for a third time if you have a solution that would be amazing! 
Did you load the scene?
–Eric
How would you do this? :-o
Ah thank you Eric, it worked!