I have a QT Pro key for version 7 of QT Pro...I have a Panther Mac with QT 6 and I would like to upgrade it to QT 7 Pro but IIRC, there's some version of QT 7 for which my key is no good, so I'd like to upgrade to JUST QT 7.0 and no further.. any idea of how I can do that? thank you! zc