Starter Deck file names start with STA, Structure Deck ones start with STR. Decks are sorted in their release order.
If you find any mistakes, report them in the "Issues" section on this page.
Download this zip archive: https://github.com/larikk/ygo-ydk-files/archive/refs/heads/main.zip
Click on the file you want, click on the "Raw" button and press Ctrl+S. Save it wherever you want.