I've installed the latest version of 9.1 from the official website, you will see that it installs properly on 64bit architecture, but after it has been installed, in the title bar it specifies that the running version is 8.0. It's kinda confusing, but this is the only download available from their official website.
If you have another one, download the latest using the following link and test it by yourself: http://115.119.206.90/eLicense/eTimeTrackLite.zip