Just for the sake of curiosity, I looked at the 7-zip site. I think its worth mentioning that if you take a closer look at the download button, you'll see that it only accommodates up to Windows XP. If you've got a Windows7 operating system, it might not work properly. There might be a patch for the Windows7 somewhere, but I didn't look much further. I asked my in-house computer tech (my husband with 20 years of experience) and he said that 'WinRar' is the recommended program for Windows7. There is a free version of WinRar, but its probably just a demo version with an expiration date. Like most of the necessary Windows programs, the full version comes with a price tag... but I checked, and it isn't too bad.
I have just downloaded the 7-zip which unzips .rar files Good luck
Go here and download Free program called "7 Zip" - it will unzip rar and any zip files. I love it!
A rar-file is a compressed file, just like zip. You have to 'unrar' them and you'll find designs in several formats, keep the jef and delete the rest.