Hi Burr, there haven't been any changes that I know of to that. It should be the same in V3 and in V4 - Windows will prevent MoI (and any other program running at normal privilege level) from writing to either the \Program Files or \Program Files (x86) directories. MoI is now installed by default to \Program Files since that's where 64-bit programs normally go to.

Is it possible your system settings for UAC have changed at some point? Probably if you enable or disable the UAC stuff in Windows it will affect this as well.

Maybe it would work well for you to put MoI into some other folder that isn't protected by Windows like that?

- Michael