"Скачать программу rutor.org" (Skachat programmu rutor.org).
In the phrase (Russian: скачать программу rutor org ), the proper article to use depends on the language of your text: In English skachat programmu rutor org
Use "the" when you are talking about the well-known platform as a specific entity. In Russian Russian does not use articles (like "a" or "the"). "Скачать программу rutor
You would use the definite article because you are referring to a specific, unique website or its specific software client. Correct: "How to download the rutor.org program." skachat programmu rutor org