Press the 'Register License Key' button, paste your key, and click OK.
Just picked up a license for MysticThumbs? Here’s the quick way to get it activated and remove the watermark:
A Mysticthumbs license key is a unique alphanumeric code that is required to activate and use the software. The license key serves as a proof of purchase and allows users to access all the features and functionalities of Mysticthumbs. Without a valid license key, users are limited to the trial version of the software, which may have restricted features and functionality.