This is very narrow-specialized software suitable for photon echo data processing for custom experimental setup in Institute of Spectroscopy of Russian Academy of Sciences. You possibly don't need it (maybe you can use it as example of QtWidgets, Matplotlib, pyqtgraph and lmfit).

Best way is to use Miniconda with Python 3.5. Create new virtual environment:

conda create --name edp --file conda-req.txt
activate edp

You still need to install packages that is not in conda repos:

pip install lmfit

Then run main.py:

python main.py