Today I got an email from the original designer granting me permission to publish my code under the GPL. This does not affect the original code at all, and the license for that is unchanged. My code is written in Python, using TKinter for the GUI. It is more or less a direct translation of the Borland C++ code, so I cannot claim it is completely original work. The source code will be published on GitHub. It's not finished yet, but most of the parts are in place.