Restore file from portable hard drive

Computer OS: Windows 7

Hello, I have a Toshiba Canvio 3.0 portable hard drive, and am wondering how to restore a specific file from one of my previous backups. The file is an HTML file of my Google Chrome Bookmarks that I exported to keep as a backup. I didn't save all of them on my computer hard drive, and I only kept the most current exported HTML bookmarks file that I created (now I'll start saving all of them to avoid my current predicament).

So I figured that I could just hook up my portable hard drive and restore the specific file I want from a previous backup. Once I hooked it up, I went to Windows Explorer > Computer > Toshiba Canvio Hard Drive ( E: ) > restore (File folder) > RestoreStarter (Application)

When I open the RestoreStarter Application, it comes up with the NTI Backup Now EZ program, and another message over that, saying "Warning! Backup Now EZ was unable to find your backup data set in the original location. If you have moved the files you can search for your backup set using the browse function below."

I don't recall ever moving my backup data set from its original location. I don't even know what or where that backup data set is...

Here's a link to the screen shot of what comes up when I opened the RestoreStarter Application:

http://www.image-share.com/ijpg-2252-27.html

What should I do to get the HTML file that I want? Is it still somewhere on my portable hard drive or did I accidentally delete it?