I have Audio Cleaning Lab 3.0. I keep getting adds to upgrade but it asks for a serial number and I can't find it anywhere. I got it with an ION turntable to download and clean up old records. I don't have to cover for the CD, only the CD.
Login to your account at magix.com, account icon top right of the home page, using the email address and password you used to register ACL 3, under My Products you should see the ACL listed and the serial number.
I log in but there is no 'My Products'. It came with the ION turntable. I can't remember registering, maybe I did, I don't know. I can access the program so I probably did. Still, no serial number.