Sorry, but that download method doesn't work any more:
"One of the deployment options for Crystal Reports for Visual Studio is to use the ClickOnce deployment method.
In our older versions we hosted the file on the old FTP server called Akamai.
This Server is being phased out and we now publish our runtime and install packages which is available through various links . . ."
https://apps.support.sap.com/sap/support/knowledge/en/2886737The rest of that page may offer links that you could try, but it looks as if the ball is in AC's court.