You may have ordered your version of CheckBook before we released 2.0, so your serial number will not work with the new 2.0 versions. You can always download the latest 1.x version here:
http://www.splasm.com/checkbook1x/downloads.htmlIf you ordered after Sept. 2006, you are eligible for a free upgrade to 2.0. If you ordered before Sept. 2006, you are eligible for the 40 percent off discount for existing users. Just email us at
customerservice@splasm.com with the name or email you used to register, and we can look up your order and take care of you.