OK I am posting beta 3 tonight at last !
It will shortly be in the MQTT beta 3 thread here.
I will leave this thread for a few days and then ask for it to be closed. If you continue to use a version prior to beta 3 or have a general question post here for the time being.
Beta 3 has a lot of changes and a whole new architecture as parent/child. It represents the last step in feature additions and is near release so I don't expect there to be a beta4.
Please read the first few posts in the new topic when upgrading or it will not work. If you are running latest 2.2.0 firmware on HE I do recommend you upgrade.
There's bound to be a few initial issues and so I will promptly post hot fixes if needed and I will be looking to add this version into Hubitat Package Manager shortly. It's only one app and one driver and one optional driver so not hard to install anyway.