At first get the link and put it into the browser window.
Then you should see next picture in the center of the screen:

Now you should enter CAPTCHA (green numbers) and click "Next" button

Now, to start downloading you should press "Download" button or copy link below it to your download manager
Attention: Downloading from iFolder.ru has no limits, except speed, usually it's very low, so I advice to use download manager, or one of special tools for automated downloading: USDownloader or RapGet