Missing share folder since new Win7 PC: Case#19619258 SOLVED

Thanks vandermerwe, best efforts to reply below:
Do you have 2 disks in your Duo?
No just the one.
Do you have a backup of the share?
I have a backup as of 3 months ago, and it would be a little time-consuming to get the last three months of stuff but most of it possible (back to Amazon Music Mgr/7 download mgr/ etc). So its not a horrible nightmare - just a time-consuming inconvenience and also raises the queries of reliability (although I understand that there is no substitute for backing up and no such thing as 100%, and in any case at this stage, user error/ignorance is still very much on the cards).
What access rights have you given to the missing share?
As I say it was a while ago since I set it all up, but I'm pretty sure there was a password linked to the folder. However the p/w may have just been linked to the NAS user, I can't be sure.
You could try changing the access to give access to everyone and guest, and/or resetting permissions via Frontview.
Then try again, this may expose a permissions problem.
So this would be through ReadyNAS Frontview > Security > User & Group accounts? I have one user here who I don't think is restricted.
Or would it be through ReadyNAS Frontview > Shares > Share Listing? The trouble here is that I don't see my share folder so can't change any settings. I could try re-adding the same share name but then I worry that I might somehow be over-writing the 'hidden' one with all my data on it. What do you think?