Downloading – A Basic Guide - Internet Archive Help Center

2009 marked the transition of WinRAR to support multithreading and modern 64-bit architectures.

A .rar file is a Roshal Archive , a proprietary format that provides higher compression ratios than standard ZIP files.

This appears to be a specific legacy software archive, likely related to versions or a localized software pack (possibly in Bulgarian or Russian, given the "Sil" and character encoding artifact "вЂ").