WillsCreative Hi!
I didn't put clamping settings for the Yaw rotation as usually you will want to allow it or not at all. If you don't want it at all, just uncheck the box "Allow Yaw Rotation", and place your camera with the right Y rotation you need in the scene. If you do want a rotation but only between a certain range, then yes you can add a few lines for clamping it like so:
Open the file CameraIsometricOrtho.cs
in the variables add:
private bool YawClamp = true;
public Vector2 YawMinMax = new Vector2(0.0f, 360.0f);
then edit the ClampRotation method line 174:
override protected void ClampRotation()
{
if (PitchClamp)
currentPitch = Mathf.Clamp(Pitch, PitchMinMax.x, PitchMinMax.y);
if (YawClamp)
currentYaw = Mathf.Clamp(Yaw, YawMinMax.x, YawMinMax.y);
}