Ok, here's my solution:
I will keep NS7 loaded, just to make my visits to TS pleasant (and productive). I will delete any new profile that is created each time. Is there anything else I should be watching for to keep NS7 in check?
I will continue to use NS 4.8 for everything else I do online. Well, except at work, where I'm forced to use Explorer -don't ask what version, couldn't begin to tell you. I only come to TS on my Mac on the weekends, if I find the time.