This program, FonePaw for Android, does not include only one feature so you may be confused about the registration. Here are some solutions you may need:
1. Please check and comfirm your email address and registration code whether you typed/pasted correctly.
2. Please check whether you download the correct version of program.
3. The installation and registration of program should be in the condition of Internet.
4. Any error message you got? If yes, send the screenshot to email@example.com or submit a ticket for analyzing.