[Dx4win] Registered user DX4Win

[Jim Reisert AD1C]

Windows Vista and later have special file protection policies around
the C:\Program Files and C:\Program Files (x86) directories.  If a
program is installed there and you try to modify its files (like
updating DX4WIN), those files will either be reverted or deleted.

The suggested installation path is C:\dx4w903 or something like that.
That is what you should have used.  Or anywhere else except the
aforementioned directories.

-- 
Jim Reisert AD1C, <jjreisert at alum.mit.edu>, https://ad1c.us