I am currently using win 7 x64 and office 2010 x64 according to the help page in ms excel 2010:
I have also attempted to remove all of the safety features of office/excel in order to make sure it wasn't something just being blocked.
In any case the application suggested to me looks pretty neat and I'm going to look at it in detail. I just want to make sure it will work with my current group window and not make me use another window in it's place.