Use: you can evaluate the non-registered program in any commercial or non-commercial setting for 30 days. After you decide you want to use the program, you can register Custom Addressbook on http:⁄⁄www.customaddressbook.com⁄register.html
The evaluation version is not crippled in any way except for the time limit. It has a reminder screen which appears at startup.
Please do not set your system date backwards or forwards to extend the evaluation period, since that might trigger the program into the mode 'evaluation period expired'.