The ZED360 calibration file should be passed as the first argument in the command line.
In the exact same way, you should build the zed-unity-livelink-fusion sender (you can find instructions for building on Windows here). In the last step, instead of running from Visual Studio with Ctrl+F5, right-click the project in the hierarchy and Build it.
Then, in your Windows Explorer folder, you will have a “Release” folder inside the Visual Studio project folder. Go into it, open a terminal, and run the .exe application passing the calibration file as an argument.
If you copy the calibration file next to the .exe beforehand, the command line will be something like:
./ZED_Unity_Livelink_Fusion.exe calibration_file.json.
Then, if you play the scene in Unity, you should have avatars moving.
Once it is working, to use SVO, please refer to this topic that discusses it.