On the main menu it'll say bottom right what build you got.
Cleaning your browser cache might help.
You might need not to compress the file, usually I unzip the downloaded file from CH into a folder I previously created on my desktop, then I give the unzipped trainer administrative privilege...then let's play 🙂
[Edited by B4Marc, 7/14/2016 5:05:41 AM]
Could you please add some more information? When did you get this message? How do you run the trainer? etc ...