I got this working. I've got it working on the free desktop version and on the paid for Server version. I even have a daily reload started from the QMC which fires off a Python script.
The documentation on Execute is poor and badly written and unfortunately it's split over a couple of pages for the Server.
Here's what your settings.ini file should look like:
There should be a blank line at the bottom of the file.
If you are using Qlik Sense Server, you'll also need to do this in the QMC:
1. Go to 'Engine'
2. Select 'Advanced'
3. Untick 'standard mode'
Oh and you'll need to restart Qlik Sense Server.
Hope this helps, good luck!