You can export one or more stamps from the stamp catalogue.
Click [Herramientas] - [Sellos] - [Exportar sellos].
Select the stamp(s) that you want to export.
Enable option [Exportar todo] to select all stamps.
Click [Exportar].
Browse to the location where you want to save the file.
Enter a file name and click [Guardar].
The stamps are saved in a zip file.