How to retrieve unfinished file I am downloading in Opera?

Hello,
I am using opera browser. I am downloading a file through opera. Suddenly my net is disconnected. The download is not completed successfully. It downloads only 90% data of the file.
I forget the link from where I am downloading. I need to retrieve that file again. Is there any way to retrieve the file and start download from that previous state?
It will be great help for me if you can tell me the way.
