In the Listing window, double-click on the reminder which you want to change or delete. This will bring up the change dialog. A slower way is to single-click and then choose "Change Reminder" or "Delete Reminder" from the "Reminders" menu.
-- Responding to Reminders --
While Auspice is running it will notify you whenever a reminder is due (i.e., when the Advance Warning date/time is reached.) If Auspice happens to be the "foreground" application at that time it will bring up the reminder and allow you to change or delete it. If you are running another application and Auspice is in the background, it will send you a notification with the message. After you've read the message and clicked the "OK" button on the notification, the menu (the Apple Menu if System 6, the Application Menu at the right of the screen if System 7) will continue to blink with the Auspice Icon. Whenever it's convenient you can return to the Auspice application. When you do, Auspice will immediately display the reminder again so you can indicate whether you want to delete it or save it for a future time (if you set a recurring interval when you first created the reminder, that date/time will already be inserted into the reminder.) "Defer" is like a "snooze" feature in that it leaves the reminder unchanged except for the warning date/time.
-- Exporting Reminders --
The "Export Reminders..." menu choice exists primarily because I've had requests to add an option to print reminders. Since I haven't found the time to do that, exporting at least allows you to send the reminders to a text file which you can print from your word processor or spreadsheet. I know that's not very convenient and will try to add printing in a future release.