So for that you need to know something.
This addon have a config file.
You can find it in game folder by this path (multiplayer/heavyweaponsguy.ini)

Where's a documentation:
[OPTIONS]
heavy is = red/blue (default is "red") (You can rewrite to one of them. If there's something written invaild, then nothing will happen, and heavy's color will be red)
change color = 0/1 (default is "1") (if written 1, then heavy's color will be change every restart of the game, else - nothing)

[VERSION]
v = 1 (DO NOT TOUCH THIS. IT WILL SET A CONFIG TO DEFAULT VALUES.)

i hope you enjoy a new update