If you want to secure sensitive information, then hiding a folder is not going to do more than put a band-aid on an amputation.
It is trivially easy to open hidden folders - either with Windows Explorer (look under "Organise...Folder and search options...View Tab...Show hidden files, folders and drives") or with a simple application - which completely ignores the hidden flag (or your program couldn't find it either).
Instead, store your data in a conventional place (see here:
Where should I store my data?[
^]) and use encryption to secure it from view.