Earlier quoted context omitted.
Very good news that the Freepascal version compiles and works correctly also on Windows. As you said, Delphi was a huge barrier to prevent other developers to contribute, but if we can use Lazarus, Heidi can receive a lot of help not only for Linux version but also for Windows one. Probably, thanks to Freepascal / Lazarus, it can be ported easily also to Mac OS now.
These days Delphi has community license for non-commercial use
Right, but having a unique codebase and one development tool for Linux, Windows and Macos (probably), would help a lot to reduce the effort to maintain the application.