Sorry for the confusion, there's not supposed to be any permissions in the Usergroup Manager in the Lite version. My bad
Since I can't seem to find any forum for testing or indeed any staff room to test mentions, I don't know if re-uploading the files has fixed it.
Could you please test it now and see if it works better?
If not, I'll need to know exactly which test scenarios worked and which doesn't
Fillip