Thanks so much for the speedy reply and the tip. I opened in Excel, and it worked great!
I noticed, though, that even when I specified certain date parameters for my report (say, Nov. 1st through Dec. 21st of 2011), the downloaded report had ALL sales, not just my chosen timeframe. I could see the correct info on my screen when I viewed the report but when I dowloaded it, it pulled all data.
Am I doing something wrong?