*** How to resume movie rental download?

I started to download a movie and then had to quit iTunes and restart my Mac. When I opened iTunes it wasn't there so I searched for it and the message said "you've already rented this, do you want to rent it again?". I was only about 75mb into a 1.06-ish gb download so that's not possible.

How do I resume this download without paying to rent the movie again?

Thanks in advance!