I went into "Apps" then selected "Install app from file" and directed it to the tar.gz I downloaded. While the Add-on shows up in the "Apps" section on the Home page, clicking on either "Inputs" or "Configuration" shows what appears to be broken HTML (up top) and further down clicking on "Inputs" shows nothing and clicking on "Configuration" and selecting one of the tabs (Account, Proxy, etc.) shows nothing.
Does this Add-on require some minimum version of Splunk? I'm on 6.1.3.
If not, the App found inside the .tar.gz would appear to be buggy. Neither the README directory or the README.TXT in the download were useful.