After receiving your registration code of iOS Transfer, it is easy to register the program.
1) First, install the program on the computer and launch it.
2) Second, tap the button which looks like a key on the right top corner. Or click the "Menu" icon which is near the same position, and then open the "Register…" option.
3) At last, copy and paste your license code and email address in corresponding text boxes to register.
Detailed guide: How to install and register FonePaw iOS Transfer