Once purchased, you will receive an activation code via the email you provided. To activate: Open the Icecream Image Resizer application. Click on the "Upgrade to Pro" or "Settings" button. Enter your in the activation field. Restart the application to enjoy full Pro functionality.
Assuming you are looking for a review of the actual software capabilities to decide if it is worth purchasing or using, here is the breakdown: icecream image resizer pro license key exclusive