After purchasing, NCH emails you a registration code.

You enter this code on the NCH Software activation website along with your personal details.

Help you find the if you have an old license. Let me know how you'd like to proceed! Switch Sound File Converter Versions - NCH Software

Getting your software officially registered is a straightforward two-step process involving an and a Registration Code . Here is exactly how to do it safely and legally. Step 1: Activate Your Purchase

If you've been using the free version of NCH Switch Sound File Converter and are ready to unlock premium features like for professional formats or command-line tools, you’ll need a valid registration code.

A powerful, open-source audio editor and converter that supports a wide range of formats via optional libraries.