What version of PT3 did you download? If you didn't download our latest Beta, I'd recommend using that version - we have fixed many issues since 3.10 and 3.11.6 should work considerably better for you.
All you should need to do to get the HUD working is to open PT3 and click the Begin Auto Import button on the Auto Import tab once everything is configured. If you're having trouble configuring your sites, please see the Configuration Guides on our
documentation page - they will walk you through what you need to do for each site we support.
If your hands are importing and you do not see a HUD, please consult our
HUD FAQ which lists all of the common reasons for this kind of behavior.