When you launch SpotiKeep Apple Music Converter, a pop-up window will show up for registration. If you are not ready to register, just click Cancel to go on free trial. Or you can click Purchase to subscribe to the program and get the license code.
If you have purchase Apple Music Converter, you can enter the licensed email address and license code to the form on the window. Then, click Register to unlock the full version of SpotiKeep Apple Music Converter.