If you have already ordered the license of Store Manager for x-Cart and launched the latest Sunset version of the program you will see in the right lower corner of the window the appropriate pop-up ad (advertisiment).
The field below helps to close this banner and doesn't display it, when Store Manager is running, anymore.
Please note, this possibility is available only for users who have purchased the application's license. Otherwise, you need to buy so-called 'Ad Banner Remove Key' to be able to turn-off the ad.
Click on the interrogative button - 'Want to close?' - and specify your license key for Store Manager's registration in the form, which appears.