How to unlock the trial version?

If you have paid Atop CHM to Web Converter registration fee, you can unlock the trial version by:

Click Help menu, point to Enter registration code. Register window appears.

You can also reach the register window by clicking Enter registration code button at Atop CHM to Web Converter start up page.

Fill your user name.
Copy and paste the registration code EXACTLY as it appears in the instruction.
Click Ok and Restart Atop CHM to Web Converter.