You need to download the RAR files.
http://discuz.turzx.com/d/556-5inch-apex-legends-horizontal-screen-theme-2-type-4-videos
Inside the RAR files, you will see folders that match the Turx software, such as "theme", "video", "icon", etc...
Unzip them as-is into the root of the Turing Smart Screen as the ".turtheme" file maps to all these folders for the components (like fonts, background, icons, etc...)
Once the files are in, you need to restart the Turx application for it to read the new files that you unzipped. Go to Home -> Themes and in the drop table, you should see your newly added theme.
For those with animated background, you need to click on "Background" and go find the video file, usually in the "video" folder and select it.
Done!