Performing A Clean Shutdown
To properly close the s3a, s3e, s3p, s3pup, s3r, s3rp, and s3rh launchers, go into the command or terminal window and type Control-C. This will ensure that all of the processes started by a launcher are killed correctly.
If you kill the command or terminal or window before pressing Control-C, processes may be left in a running state, preventing you from restarting the launcher. If you forget to use Control-C and cannot restart the extension with its associated launcher, reboot your computer to kill the running processes.