Bonjour is a network discovery service that helps Mira find Max so you don't have to configure IP addresses.
Bonjour for Windows is automatically installed with iTunes which you might already have. Don't worry though, if you don't want to install iTunes just use this link to download and install the Bonjour library (print services).
Due to the setup of the Apple App Store, Cycling '74 does not have access to customer names. Eventually, you may be able to note that your own Mira in your user profile, but will not be considered proof of the actual Mira purchase.
Max for Live devices should work with Mira. However, when editing the patch you will get duplicate pages in the Mira app, so it can be a little confusing. We focused on Max 6 for the initial Mira release and are hoping to improve the Max for Live experience in future updates. We're interested to see how developers will use Mira with Max for Live as well.