Hi and a Very Merry Christmas To All

My problem is that I have messed up part of my website in NOF 15, I don't have a good backup as I had overwritten the backup before I realised I had made a hash of part of my site.

What I need to do is Download/Import my online version which has not been altered yet. Is this possible ?

I have tried to bring my online version into NOF with my FTP program and just overwriting the items in NOF but I just get the same messed up site.

I can't see any way to make my online site be the one I am editing in NOF.

Any Help Please.