Twistory is $10 (US or Cdn) shareware. You may evaluate it for free. If you use it regularly, keep it for more than one month, or use it for presentation to a group, I would enjoy getting a little something for it. If you feel so obliged, you may send the payment to:
John de Boer
60-A Lundy's Lane
Kingston, Ontario
Canada, K7K 5G7
If you desire support, please send your e-mail address along, and I will write back.
Registration of Twistory is necessary only once. If you have already paid, you are entitled to use any future release without condition.