The most direct way is via the official Witte Software website. They offer several licensing tiers: Best for individual engineers.

For those integrating Modbus Poll capabilities into their own software. 2. Check Your Email

If you lose your key, you can contact Witte Software support with your original purchase details (email, order number, or company name) to have it resent. A Note on "Cracked" Keys and Keygens

The trial version disconnects every 10 minutes. A registration key removes this, allowing for long-term monitoring and stress testing.