There is a minor proviso on that, in that Paul / Frank would like to be kept advised of any projects which are developed using QDOS and sent a copy.

Actually, Paul thought that they had given this approval in 2009 (!) so maybe we missed something.Dave wrote:All they own is the right to make new copies of QDOS within the US. If the copy is made outside the US, lawfully, it can be freely imported into the US. If the copy is pre-existing, it is covered by First Sale Doctrine.
To avoid having to deal with that issue at all (and to keep things simple) my little project uses Minerva.
That said, it is far too late for this change to come, in the same way that it was far too late when this change came for SMSQ/E - there will sadly be no major new developments with either OS.