Please follow the instructions to change your MultiCHAX Serial Number:
- Right-click on Start
 - Select Run and type regedit.exe [hit Enter]
 - Go to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\MultiChax\Serial Number\ (64 bit machines)
 - Go to HKEY_LOCAL_MACHINE\SOFTWARE\MultiChax\Serial Number\ (32 bit machines)
 - Double click on the Default icon
 - Change the field Value and update the Serial Key Number (case sensitive)
 - Click on OK
 - Close Registry Editor
 - Restart MultiCHAX