The simplest way is probably to use a [font=courier new].sh3d[/font] extension for your file instead [font=courier new].xml[/font], so the open file dialog will let you select it. You can also use a command line tu run Sweet Home 3D application followed by [font=courier new]-open[/font] parameter and the file you want: But caution, if you will save, the generated SH3D file will be at default file format, i.e. a zip file containing a [font=courier new]Home.xml[/font] entry and other entries for images and 3D models.