I could not reproduce reported problem, update does not change any settings.
Please can you provide following information:
- Is it possible that you added the user as trusted or administrator on the server?
- Is it possible that your server was displaying login window?
- Is it possible that windows user accessing desktop is administrator?
- What was the version number you were updating from?
As well please can you provide result from the command:
grep PhysicalDesktopAuthorization /usr/NX/etc/server.cfg