I just put up a Linux build, which SHOULD work for ChromeOS, as far as I know!
Okay, if you haven't figured it out yet, apparently what you need to do is do what you would do for a zip file on a PC - hover over the folder and extract the files from the .tar folder. Like I said, I'm not too familiar with linux, and I can't test it myself. But I really do hope you can get it to work!