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Download the following zip https://client.smartcircle.net/apps/samsung/userwidget.zip
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Extract the folder
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Move the extracted folder called userwidget to a USB flash drive. Make sure that there are 2 files inside the folder.
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Connect the USB flash drive to your Samsung TV.
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The app should install automatically once the TV recognizes the USB flash drive.
 - Open the installed Remote DS app and proceed with Enrollment.
 
Do not use the zip, but the extracted version of the folder
Copy the userwidget folder to a USB flash drive (place it in the root of the flash drive, not inside another folder).