Hi,
I wonder if anyone can give any advice on how to recover my books please. I have updated from Windows 7 to Windows 10 and I can not find any books in Calibre

I have looked at the manual and also on this forum but can not find a solution.
I have tried to create a new folder using switch/create library and I can see the files in the attached screen shot. I have no idea how to get my books back.
I am not that computer savvy so things like command line mean nothing to me, if anyone can help please give me simple step by step instructions (treat me like a complete idiot

& I might understand)
I have Calibre 2.51

Rob