Rars can be opened with a lot of different free programs. Personally I use
You must be registered to see the links
and it can be downloaded for free.
Install it, download the rar (I used GoFile's link), right click on the rar and use Open With and select 7-zip. It won't create a folder for the install so you'll have to designate one.
Also, the reason there's no Mega Link is because Mega sets a file size limit at 10GB. Since this is now 12GB there will never be another Mega Link for a single download.