Apparently what I was doing is generating the cart files BEFORE I was saving the project.
I'm glad I could help
Yes, saving the project is an optional activity, so you can generate files for programming Megacart without doing that.
At the time Bernd proposed to have a customizable header, MegcartStudio was almost ready and I didn't want to spend too much effort on that.
Hence the idea, to re-use the project file name as a text to be shown in a header.
By the way, the *.mcp project files include all games and are compressed, so it is convenient to share them or to exchange them with other users.
You can even extract the games from the *.mcp files using MegacartStudio.