Many thanks to Blue/Bluebotlabz!
This downloader is excellent. I used it to download Phonak Target 8.0.3. I took a quick look at the Github page, downloaded the zipfile, extracted it and opened these 3 scripts:
start.bat
Phonak Target Downloader.py
libhearingdownloader.py
The script is doing nothing special, it downloads a specific file which has a summary of all needed files and then it starts downloading those individual files. The clever part was for Blue to find that specific file describing all the other files needed.
I ran the script on my Mac as it already has Python installed. I manually installed (pip3 install ) the modules which on Windows are normally installed by the start.bat file by refering to the 2 requirements.txt files. After that I could run the script and successfully download the software.
This is just great!