After a long time there is a sign of life from me...
I apologize for the long time without an update or information. I haven't worked on the editor in almost two years. On the one hand for time reasons and on the other hand for technical reasons. The editor has grown since 2014, back then I was still a complete programming beginner, which is unfortunately also reflected in the code and architecture.
The editor was written using Windows Forms and C# and, in my opinion, is very far from state of the art.
Therefore, I decided to recreate the editor with Python.
The editor will then be a cross-platform application, i.e. able to run on Windows, MAC and Linux.
I can take over the basic functionality but the entire architecture is now set up cleanly so that the code is more maintainable.
I set up the editor as an open source project:
https://github.com/KevConrad/GaiaPyCreator
This gives you the opportunity to track progress, test interim versions and also collaborate.
I will definitely keep you updated on the progress here.
I think the porting will take at least half a year.