Editing my previous post as I have figured it out and have it up and running.
Installed ver 21 on my NAS, but I imported a config file from old install and that caused a bunch of issues. I have corrected it mostly, fixed webdir paths etc and it downloads my files , extracts and emails me with success, it also deletes the zip files.
However there are some menu items missing in my web interface.
The only items there are
Info, About NZBGET, System, Web Interface :: Options :: Logger Email :: Save all changes
The email item was missing until I fixed the path to my scripts which have email.py and logger.py
Any idea why Unpack , Check and Repair and Extension scripts menu items are missing?