Not that simple unfortunately, but a nice idea!

I RDP'd into the server, went into IIS to see the home directory, and went straight to the home directory to edit the live file. They're the only files I can find for this company, there is no sign of any test/design version.

But also I stopped the site in IIS - surely that should kill it until I restart it again?? But it didn't - stop the site, refresh my browser (any browser) and the site is still alive and kicking...!