As I have a Mac, what I did was to install the last version of Python 3, and open a Terminal window to: 1. Go to the AR4 source code directory 2. Create a virtual environment in this terminal window (do "python3 -m venv venv") 3. Install the ttkthemes, pyserial, and numpy libraries (using pip3 install <package>) 4. and finally do: python3 AR4.py Hope it helps doing the same in Windows.
