After you order the full version of NoteBurner, you will receive the code to activate the trial version and unlock the limitation that only 3 minutes audio can be converted. You can register the program as follows:

Run NoteBurner, click the menu More> Enter License Code. There will be a registration popup dialog. You may input the Name and Code manually. The registration name is case sensitive. And, please do not add blank at the beginning or the end of the word. You can also copy and paste the Name and Code into the registration popup dialog.