Export Data: Downloaded file is 47 MB, but when I un-zip it shows folder is empty.

I just download my form export data, and the zip folder is 47 MB but when I unzip it it says the folder is empty?

I have just downloaded your file and I can see it has the data:

Could you please download one of these programs to un-zip your file? 

http://www.winzip.com/win/en/index.html  

http://www.7-zip.org/  

http://www.win-rar.com/ 

Please do let us know how it goes.