Does anyone know how to bypass win.rar passwords.

I mistakenly deleted the 'installed worlds' folders from my Sims3 game so now I have to reinstall all my store worlds.

I luckily kept all the WinRAR files however I neglected to save the password needed to open them.

I've tried searching for the website but it seems to have been taken down. (It was a WordPress blogspot).

I'm hoping I can find a way to bypass the password so I won't have to redownload everything all over again.