Thanks to @JohnM and after hours of work, I have now install PyCharm and I am running the OpenLP-2.9.2 successfully for debugging on my windows 10 platform.
When I Run, Debug the OpenLP-2.9.2 it runs to "threading.py" and fails at "from PyQt5 import QtCore.
Under View, Tools Window, Python Packages I can see all the Installed package (and there is a bunch) and PyQt5 5.15.4 is installed.
I'm guessing that I may not have the correct versions of something installed:
I have Python 3.7.9 installed, PyCharm 2021.1 (Community Edition) Build #PC-211.6693.115 and running OpenLP project extracted from OpenLP-29.9.2-1.tar.gz
Can anyone help?