Way to keep a weather eye on the changelog! Indeed that has been release. However, your theme has to support it. If a theme has been customized in the past it might not load the new organizers. What theme are you using? Is it up to date?
Good question. You could either modify the .po/.mo files. Use a universal textchanger, there are some plugins and snippets available for this. Or you could use the filter ‘tribe_organizer_label_plural’. Just return a text string to that filter, whatever string you use will replace ‘Organizers’.
Does that all make sense? Will that work for you? Please let us know.