Thanks for the guidance - the registry entries set up by my login didn’t have read access from the other logins at all. Fixing that has solved the problem.

Incidentally, this knowledge has also allowed me to fix another annoying problem - Zone Alarm on the other logins always prompted to go into the tutorial every time it started. I’ve changed the permissions on the registry entries for that too, and now it understands…

Thanks again, and the product is looking pretty good…