1. Install Python from here
(instructions are OS-dependent and readily available e.g., in Youtube)
2. Make sure the installation went well, environmental variables are set. In Windows you open the command prompt and run 'python' command to verify that.
3. Go to the GitHub page of Dezirteer
4. Clone the repo.
5. Run 'dezirteer/dezirteer/main_gui.py' using Python.