What does your computer use (Windows or Mac)?

AnyTrans is an all-in-one iOS data manager that is designed to help users take complete control of their iPhone, iPad, and iPod Touch data. It goes beyond what iTunes can do, enabling you to easily manage and transfer a wide range of content, such as music, photos, videos, messages, and contacts, between your iOS devices, computers, and various cloud services like iCloud, Google Drive, and Dropbox.

AnyTrans Activation Guide: Features, Registration, and Safe Usage

Look for the Register or Activate button (often shaped like a key or shopping cart) in the top-right corner of the interface.