Hi,
At the link you posted... Either of the top two on the list depending on whether your machine is running 32 or 64 bit Windows 10... If you are unsure, the x86 for 32 bit would work on either...
BTW... WinRar is a nice program, but it is not free like the 7-Zip... 7-Zip would be your best choice for a free extractor program...