NewsReactor is shareware and will only work for 50 times. Registering it will entitle you to full usage beyond that period and free upgrades as well.
How to get a license
In order to get a license, please open your web browser and go to http://www.daansystems.com/newsreactor/. There, follow the instructions and you will receive your activation code, so that you can unlock it.
Activating the program
When you have your activation code, proceed to the Registration option in the Help menu, or select the "Now let's enter the registration code" option in the starting screen.
You will be presented with this dialog:
Enter the details exactly as you got them after buying the license and press the OK button.
Congratulations! You are now a registered user of NewsReactor!