Access Individual files in Backups

I really think your product is the cats meow.
I do have a question that I cannot figure out. I have a 10GB folder which has my documents in. I have encrypted it and then backed it up to an external hard drive. If I have one file on the computer that I need to replace from the backup, the way I figure, I cannot retrieve that single file without recovering the complete 10GB folder to the computer, and overwriting the original 10GB folder. Is there not a way to recover on file at a time from the backup?
Chuck
I do have a question that I cannot figure out. I have a 10GB folder which has my documents in. I have encrypted it and then backed it up to an external hard drive. If I have one file on the computer that I need to replace from the backup, the way I figure, I cannot retrieve that single file without recovering the complete 10GB folder to the computer, and overwriting the original 10GB folder. Is there not a way to recover on file at a time from the backup?
Chuck