When you have your User Name and License Key follow the steps bellow.
1 - Click on the red smiley face at the right bottom of the screen, select "Codec properties" :

If you don't see the red smiley face try to go to Start / All Programs / Morgan M-JPEG codec V3 / Quick config
2 - Click on [About] :

3 - Click on [Register...]

4 - Enter your User Name and License Key by respecting the case :

5 - 'Registered' appear under the logo (32-bit) or 'Demo' disapear (64-bit) :





