https://www.mackichan.com/index.html?techtalk/407.htm~mainFrame

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MacKichan Software, Inc. has gone out of business

Sales have ceased for Scientific WorkPlace, Scientific Word, and 
Scientific Notebook

MacKichan Software, Inc., after providing word processing software
for those who speak the language of mathematics for forty years
(under several names), closed its doors on June 30, 2021. This marks
the end of sales and support for the MacKichan Software products.

All owners of Scientific WorkPlace, Scientific Word, or Scientific
Notebook should have a serial number that was included in their
purchase. This number is also included in the license file for your
installation as the last line in the file. If you need to install
your software on a new or different computer, you will need to
re-activate the software on that computer using that serial number.
The software can be activated as before, using the Help/Activate menu
item. This contacts the MacKichan Software licensing server, which we
will keep running for at least two years.

Sites with permanent site licenses will, of course, be free to use
Scientific WorkPlace, Scientific Word, and/or Scientific Notebook as
long as they like. Those sites that have paid for maintenance with
home-use satellite licenses can continue, but will be unable to
create new satellite licenses after their maintenance agreement
expires.

We expect to make Scientific Word an open source product eventually.
Since both Scientific WorkPlace and Scientific Notebook contain the
proprietary computer algebra system MuPAD, they cannot be made open
source. When the open source project for Scientific Word is
established, an announcement will be made here.

We hope to make version 5.5 of Scientific Word available in the
future. It currently contains several components that are licensed
and not owned by MacKichan Software. These components need to be
removed, and our intention is then to make Scientific Word version
5.5 open source.

Barry MacKichan
President
MacKichan Software, Inc.

July 1, 2021

The latest released version of these products is 6.1.2. To update
your program to the latest release, click here.
The same page also contains links to the installers for version 5.5
and the manuals for versions 5.5 and 6.