Requires Windows XP SP2 or later. Also compatible with Linux and other operating systems as long as you have xulrunner installed. To run it on Linux use these commands:
$ unzip easyderivsteps1a-w.zip
$ 7z x easyderivsteps1a-w.exe
$ cd easyderivsteps1a-w/
$ xulrunner code/application.ini
See download links below for ZIP archive:
easyderivsteps19-w.zip: v1.9 - July 1, 2014
easyderivsteps1a-w.zip: v1.10 - September 24, 2016
easyderivsteps1b-w.zip: v1.11 - October 14, 2018
This program is now open source. The source code is at: http://github.com/bl0ckeduser/easyderivsteps