Q: How to get Spreadsheet App. files off of ICloud?

I upgraded to IOS7 on my Ipodtouch Gen 5. First I backed up my files to the ICloud. The Spreadsheet App I bought at the Apple Store last year is no longer sold there. The Spreadsheet App now crashes on IOS7 (it was working great on IOS6 with my many files). How do I get my suposedly backed up to ICloud Spreadsheet App files off of ICloud and onto my computer? Perhaps I can than load them onto another IPOD (older IOS) that I have that has a working Spreadsheet App. I do not want to loose all me spread sheet files.