(This is the wrong forum to be asking this question...)
The demo is not available for download. A CD must be obtained from your reseller or you can borrow the standard installation CD from any nearby user - the demo version is the full version without the USB protection key.
Karl
AC 28 USA and earlier • macOS Sequoia 15.3.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
