You need to use Git GUI. Can you do the following?
Search for Git GUI, right-click the icon and select “Run as administrator“:

Yes, I got past this stage, then it said to to open git bash. which I did and then asked me to open a Git Bash session pointing to [ARDUINO_SKETCHBOOK_DIR]/hardware/espressif/esp32 and execute git submodule update --init --recursive
I do not know what this means? To point to ARDUINO SKETCHBOOK_DIR >

But does that happen in a new window? Can you execute that command? (That command should automatically run in the background)

I am away for two days, I’ll test it when I get back, thanks

Run that command run or allow it run (because that’s what’s going to actually download the ESP32 add-on).
Ok! Let me know your results when you come back.
Regards,
Rui