Win RaR not free?

Hi! I haven't downloaded anything in almost a year. I downloaded a Rom, extracted it onto my CycloDS, put it in my DS and it showed just a folder icon under my games that won't do anything! I went on my computer and clicked on the file and a window popped up saying Win RAR is not a free program and I need to buy it. Can anybody help me out? I'm not real tech savvy but I do follow directions well! ;)

it is free. but that usually happens. its better if you right click the file you want to extract and press extract

just click 'close ' on the box telling you to buy it. The program continues to work.

So do you have any guesses as to why all I'm getting under my games is a folder icon, 2 actually, 1 has 3 dots by it, the other has the game name and "last played" next to it. When i tap them they bring me back to my main DS game page. I'm using a ROM site I've never used before. I use to use this one for all my ROMs until we stopped being able to use it, but I did get the site from the Affiliates page.

not sure. but you can still get games here. its in the nds share section: http://forum.romulation.net/index.php?board=55.0