It worked fine for me. What did you do?
Would you please follow the below mentioned steps:
1. Uninstall Lightroom
2. Restart your computer
3. Download it again from the below link:
I contacted support , they told me it was a temporary file issue which would not affect the program. It seems to be working ok.
Thanks , I did download twice with the same result, but according to support , it should be a problem. I will see in time .