after a computer crash, I reinstalled program from the dvd backup disc but the program won't allow me to enter the serial number as it says the number is already in use (from my original installation)
Using a web browser got to www.magix.com , clicked the Account login icon top right of the homepage and login with the email address and password you used to activate Web Designer initially.
Under My Products you should see Web Designer and a link Show more details, click this - you should see 2 activation slots, one will be the computer you are re-installing on - de-activate this.
Activate the new installation - copy and paste the whole serial number including the P3- prefix