[SOLVED]Prevent automatic start with linux?

[v4c4]

Hello everyone! New member here.
I was wondering how I can stop qbittorrent from starting up on boot. I believe the windows version of QB gets an option in the settings, but I couldn't find one in Linux (Mint 18 MATE). QB isn't listed as one of the startup applications and the terminal command:
sudo update-rc.d -f qbittorrent remove
didn't work either. (EDIT:  It did work)
The reason for doing this is because QB starts up before my vpn program, rendering it useless as I have already made direct connections with peers by the time the vpn gets working.
I am running version 3.3.7 of QB
Has this feature been overlooked on linux?

[v4c4]

I did another reboot just to make sure. And it worked! No more QB at boot up. The command above is the correct method to prevent QB from starting up.