Unfortunately there are no windows objects for mira just yet. We're hard at work and should have something out shortly. When the windows objects are available, you'll be able to download them from the Mira product page.
it doesn't work for windows at all, as stated above. it works fine on a mac, if anyone still needs help, i had to download the package as per above, if your download fails, try a different browser, your cache might be full so clear that.