Search for it, I think you can configure your antivirus software to allow installation.
You should only either use black+white or yellow+green+gray connection with Ardupilot.
I think your multiple CAN ESC is not working likely their default IDs are identical.
This forum have many users seeking help in configuring hobbywing CAN interface with Ardupilot, search for it.
The doc is for integrated ESC with motor, but I think it could be similar to standalone Hobbywing ESC.
Ardupilot firmware greater than 4.3.8, if I remember it correctly, I experience black becomes warm compare to 4.3.8 and before. So, I have shelf the Black since then. The default ESC CAN speed may not be identical with Black, that could be the possible reason. If you use only the white+black connector with Black MAIN out ports, I am very sure, no issue.