You can use GBDeflicker free for 15 days. After that time, you need to purchase a serial number and register your copy.

GBDeflicker Free Trial Screen

Clicking on the "Buy Now" button, opens your browser at the Granite Bay Software web site where you can purchase a serial number. After purchase, the serial number will be emailed to you immediately.

GBDeflicker Registration Screen

When registering your serial number, be sure to enter your name exactly as it appears in the serial number email that you received.