WinRAr 3.70 to umí, stačí na soubor který chceš rozbalit poklepat.
Additionally to complete support of RAR and ZIP WinRAR provides basic operations for 7Z, ACE, ARJ, BZ2, CAB, GZ, ISO, JAR, LZH, TAR, UUE, Z files created by other tools: view contents, extract files, show comments and archive information. You do not need to have any external programs to handle these formats