remove fortinet from dock

Hi,

I'm using the FortiNet VPN client. I've already removed the automatic startup from the user, however once I start the client manually, an icon pop-up in the dock. While using the VPN I dont mid this though it bothers very much when I disconnect from the VPN and turn it of, the icon remain in the dock and requires manual shut-down forcing me to enter a password. I know that this icon in the dock is not crtical for using the client and would therefore wish to delete/rename the file that it wont be started by the client anymore, Does anyone have a hint for me in which folder I should look? (I found this folder in the past and did this renamin though unfortunately I didnt document this and now after updating I'm back searching...)

Any advise helping me to resolve this is welcome.

Thank you!