Unblocking PSM1 files not working

This may apply to other PS extensions, but PSM1 files is what I was working with.  When I unblocked them, I was able to apply the change without any errors.  However, when I returned to the properties of the files, they were still blocked.  My account is a member of the administrators group that has full-control of the files. 

There are two problems here:

1.  There was no error even though unblocking the files did not work.

2.  The files did not get unblocked.

I was able to get around this problem by giving my account explicit permissions to the folder where the files resided.