To upgrade to the PRO version using an activation key, follow these steps in the desktop application: : Open PDF Candy Desktop on your PC.

: Get faster assistance from the technical team if you encounter issues.

When you upgrade to the Pro version (via a monthly, annual, or lifetime license), the "key" essentially unlocks two distinct environments:

Below is an overview of why avoiding unofficial keys is critical and how to legally access PDF Candy Pro features. The Dangers of Unofficial Pro Version Keys