V4.22 Update Error

Tried to run the winscp422setup and got the following error. C:\Program Files\WinSCP3\DragExt.dll

RestartReplace failed:
MoveFileEx failed; code 5.
Access is denied.


What do I need to do to complete the install?

Thanks.

Please run:
winscp422setup /LOG=setup.log
and email me the log.