It appears that the latest update no longer allows you to go back and change the date for sending invites and reminders. If I need to change this date or add an additional invite I now have to delete the event and start over. This results in loosing any data already recorded by individuals that will be attending.
One of the reasons we continue to use TroopTrack is the calendar feature. If we are unable to easily make changes we will have to reconsider the value of TroopTrack.