Woohoo! I did it. But I had to manually upload a csv file of my Group IDs and names via phpMyadmin as the Groups table in blue_sky_music only contains the example groups.
Can I suggest that this is built into future versions of SecurityAssist as a standard feature? Any poor admin person creating user accounts and allocating user levels has to refer back to a list of user levels with their IDs at the moment (in our case numbering 50+ levels), and type in a number. A dropdown select list of user level names is MUCH more user-friendly.