Horizon problem

I am trying to backup my xbox360 games and using Horizon to extract the files to my PC from a USB stick. I load up the device no problem and get to my games but when I select the file I want and extract selected file I get the following message:

An error has occured while extracting your file! If you see a developer, tell him this: Object reference not set to an instance of an object.

Now I know the error message says you must be a male developer but I personally would appreciate any help or advice anyone has to offer regardless of title or gender