The module is being saved automatically together with the Host Project. AseptSoft detects the saving events of the host platform and triggers an internal AseptSoft save.
In order to keep the atomicity of the module and to keep it consistent with the host project, there is no way to manually save the AseptSoft modules. It will always save when you save your host project.
To protect the visual appearance of the PID in your Host Project, AseptSoft ensures that the PID will be saved without the AseptSoft visuals. When you open your project next time, you will notice that there is nothing from AseptSoft visible in your PID while the AseptSoft project is closed. This is done through a software overlay which removes the unwanted parts from your saving.