With Mint 18 Cinnamon easy to auto start just go -Menu- -system settings- -startup applications- -add- -custom command- give it a name, then under command type hnsm, I choose a delay time of 1, then reboot and there it is in the tray.
I do have a snag that the daily graphs did not work but the usage wheel is there, I will see if I can figure that out and let you all know. Unless someone else can figure it out first.