1. Free trial version vs. registered version

Both free trial version and registered version of Leawo PowerPoint to Video Pro are free to download. However, the free trial version would keep a watermark on the output video file, while the registered version has no watermark. Meanwhile, the registered version enjoys prior tech support and free update from Leawo Software.

2. Register Leawo PowerPoint to Video Pro with license

If you've already got a license for Leawo PowerPoint to Video Pro, it would be quite easy for you to register Leawo PowerPoint to Video Pro. After you launch Leawo PowerPoint to Video Pro, you could see the below window:

Copy and paste the license you've got into the Registration Code address bar and then click the green Register button to register and activate Leawo PowerPoint to Video Pro.
You could also reach this registration code window by clicking the Menu button on the top-right corner and then opening the "Help > Registration" option.

3. Register Leawo PowerPoint to Video Pro without license

If you haven't got a license code of Leawo PowerPoint to Video Pro, you need firstly purchase a license and then register it. To purchase Leawo PowerPoint to Video Pro license, you could directly visit Leawo PowerPoint to Video Pro purchase page, or click the Purchase button to enter the purchase page. On the purchase page, you need to determine which kind of license you want: 1-Year license or Lifetime license. After payment, Leawo would send license code to you via email. Once you get the license, you could register and activate Leawo PowerPoint to Video Pro as mentioned above.