As MGI is based in Canada, and the Danish development crew who moved there has not worked on Windows-Calamus since the end of 1998, the question must concern the German Calamus SL developers. These are scattered all over Germany and can, or course, be reached directly. None of us sit in ivory towers.
At suitable trade fairs where the invers Software Vertrieb or adequate systems GmbH are exhibitors, there are almost always Calamus developers present as well and are available to answer your questions.
Our daily meeting place is the discussion group ATARI.DTP
in the MausNet – a small but fine network that was popular in
Germany long before the Internet. The phone numbers of various
(non-commercial!) MausNets can be found usually in the c't magazine.
From most Internet providers too you can participate in this group
exported to UseNet. There it is called: maus.computer.atari.dtp. This
discussion group holds pan-regional, non-commercial meetings called
ADATs (Allgemeine DTP-AnwenderInnen-Treffen = General DTP-user
meetings) somewhere in Germany 2-3 times a year which are attended by
most Calamus developers who talk shop the whole 3 to 4 days with all
Calamus users present.