Even thou I have done this before, by accident, but how do I make the "C:\Program File (x86)\Visual FoxPro 9" and sub-folders Read-write.

I have tried change the Read-Only option in the folder's Properties dialog. It indicates that the R/O is Off, but the files remain still inaccessible for writing.
I am thinking it may some kind of permission issue, but I rarely mess with that, so I reluctant to play around in that unless I have the proper instructions.

FYI: I have Windows 10 Pro.
Thank you, in advance.