First, take a look at this thread where someone had a very similar problem and worked with support to solve it, he list things that may cause it:
Once you are able to include the devices on your hub (as I mentioned, the firmware update should not make a difference in pairing, that is probably unrelated), then you can gracefully shut down the hub, plug the stick on your computer and use the HomeSeer Z-Flash software (you'll need to buy a license) to upgrade their firmware, look at this post a better explanation of how to do that:
