Usually, the shared themes comes in a Zip file.
When you unzip, you should see folders like theme, image, font, video... etc.
You should make sure these folders are the same when you unzip these into your Turing Smart Screen folder.
Once you unzipped the files, you need to restart the Turing Smart Screen application.
Once it restarts, it will automatically check the themes folder and you can select the newly added theme in the app.
One thing to note is if the theme has a video file, you should click on Background and point to the video file that the shared theme provided.