Import and convert sp3 “Superpolator” documents. Skateboard file dialog shows both types. Superpolator documentsa are converted to designspace first and then opened.
Install filehandlers for sp3 and designspace documents in RoboFont. This lets you drag those documents to the RoboFont icon in the dock. Note: if you also have the DesignSpaceEdit extension you need to get an update for it through Mechanic2.