These days (as another poster has already pointed out) it is under an Open Source license. The author of this page: https://www.autometer.de/unix4fun/coherent

These days (as another poster has already pointed out) it is under an Open Source license. The author of this page: https://www.autometer.de/unix4fun/coherent/index.html https://www.autometer.de/unix4fun/coherent/index.html previously worked for MWC and has put some quite detailed notes on setting up various aspects of Coherent running under Virtualbox there.