Yes, you can!
Assuming you have another valid licence key you would like to register ZionWorx to then simply follow these steps:
1. Locate the ZionWorx program shortcut (probably on your desktop)
2. Right-click on the shortcut and select 'Properties'.
3. Go to the 'Shortcut' tab and edit the text in the 'Target' box by adding the word REGISTER
e.g. "C:\Program Files\ZionWorx 2.6\ZionWorx.exe" REGISTER
4. Now click 'OK' and run ZionWorx by double-clicking on the shortcut.
5. A 'Enter Key' dialog will pop up allowing you to enter the new licence key information.
6. Click 'OK' and you should then see a message saying that the licence information was valid and has been stored
7. Now repeat steps 1 to 4, but remove the word REGISTER that you previously added.
8. As ZionWorx starts up you should then see the new licence key information on the splash screen.