Add support for opening .designspace files through File Explorer

[MrPropre]

Hello,

We can drag and drop a .designspace file in FontraPak but it would also be nice to be able to open them by double-clicking on them in the File Explorer on Windows. I can already associate the FontraPak .exe to open .designspace files but when I double-click on a file in the File Explorer it just opens Fontra Pak without doing anything. It should also open the browser to show me the file.

Enregistrement.de.l.ecran.2025-12-16.160948_1.mp4

Thank you in advance.