Sprite Backup will only operate for 10 days on your device before expiring. Sprite Backup will expire if;
a) you install the software and change the dates on your device it will expire the trial version.
b) you installed previous Trial versions of Sprite Backup
To continue to evaluate Sprite Backup you can purchase the software from the Sprite Software Store. If you then decide that you do not wish to use Sprite Backup you can claim a refund with the Sprite Software 30 Day Money Backup Guarantee.
To claim the refund you need to log a request with the Sprite Software Support Team here;