We currently have two Limesurvey instances - one for live and one for test, with a ComfortUpdate key purched seperately for each. We'd like to delete our test system and replace it with a fresh copy of our live system. If we do that (how) can we re-apply our ComfortUpdate key we purched for our test system to the new copy, since it will have the key we purchased for our live system? Is it just a matter of updating the value of update_key in the lime_settings_global table?