WatchMaker Premium prompt glitch

When attempting to send the custom-made watch face to my watch device (clicking "Set Watchface"), the "Get Premium!" prompt pops up, offering me to purchase the premium version of the app. Even if I click "Later" and then "Set Watchface", the "Get Premium!" dialog will still appear and will not allow me to send the watch face to the watch device.
If I click "Get Now!" and press Back button, it still occurs.
This happens in both versions 3.9.9d and 3.9.9e.