This project comes without the actual model as I don't want to republish someone else's work. I have downloaded it from the PINTO model zoo.
I opened this folder in the repository
That shows this batchfile for using the single model
That points to this actual zipped tar file which contains the "yolov7-tiny_256x320.onnx" file.
Copy "yolov7-tiny_256x320.onnx" this into Assets\Application\Model folder before opening the project