> I'm currently mirroring a website and want to
> change the scan rules on the fly.  I open the
> options>>scan rules dialog and notice that
> everything is greyed out 

In the new 3.43-BETA-2 it isn't grayed out but you still can't change
anything.
Except for limits and flow tabs, nothing else can be changed during a mirror. 

The limits and flow tabs do modify the current mirror but they aren't saved.
Changes will revert on the next run.

> Do I need to cancel the download to change this?yes