If I'm wrong on that I'll happily stand corrected on the matter.
You're not wrong. Before Andreas bought a three-year license to do development on DOpus (that license expired in 2007) Hyperion had contracted to buy the license. However, Hyperion never paid.
http://system-log.com/?p=1363"
The answer from Dr.Greg Perry :We made a number of attempts to work with developers continuing with Amiga development to further develop Directory Opus for the Amiga line. Initially we signed a contract with Hyperion for licensing and development but they proved to be, well to be blunt, dishonest and untrustworthy, not what one expected in the Amiga world:). Even after repeated requests and discussions over six months after they signed the contract they refused to honour the deal and make payments for the licence as agreed. While I have no direct evidence but considering the fact that they widely promoted the deal and their future development plans, it has been suggested to us by a few that they were never serious about development and their behaviour was a stalling tactic to boost their profile and keep the product out of the hands of their competitors. This dragged on for a long time until we decided to cancel the contract out of frustration at their conduct."