substance_painter.project.save_as() doesn't add to Recent Files

Substance Painter 8.1.3 build 1860
Recently have been developing a versioning tool for Substance Painter. (Python)
One desired feature is for it to add the file to the Recent Files list.

substance_painter.project.save(substance_painter.project.ProjectSaveMode.Full)
substance_painter.project.save_as(filename, substance_painter.project.ProjectSaveMode.Full)

does not seem to add a new file to Recent Files.

Does anyone know what the trick would be, or if it is possible yet to progmatically add the its Recent Files.?