Just bought NOF12, opened an existing site, and was delighted that a suitable mesage saying 'do you want to copy this site becasue changes are not backward compatible' appeared.
Great- finally some intelligent design.
But when I come back to it to do some work, I can neither open the original site nor the NOF 12 version, as they say the file is already open.
The original site opens and closes in NOF 10, its parent, OK.
So what's going on?
Some combination of a flaky OS - win7 plus a flaky product if the forum postings are to be believed?