[Closed] Anyone else having problems with the latest Memory Map update?

I've been trying to run the latest MM update for a couple days now (5.4.0 to 5.4.2), but every time I try the installer tries to re-install a program called WinSU. I've emptied the Temp folder as advised in the MM forum and even uninstalled WinSU but now I just get a message telling me, "The loader did not find the Windows Installer package [b]'C:\Documents and Settings\Dave\My Documents\Downloads\WinSUSetup.msi'[/b] to install."
Can anyone help please, I've already wasted an hour today waiting to get through to the MM helpdesk and to be honest they where pretty useless.