I purchased the Eloquence and Vocalizer Expressive Add-on for NVDA from A T guys. For those who have used this addon for a period of time how often do updates come out and how are you notified of them?
I can't get any response from A T Guys support.

atguys support usually takes 2 or 3 days to respond, just be patient, or email them again. As far as updates, you may get 1 or 2 updates per year, if that. It's just a tts or speech synthesizer, there really isn't much to update unless NVDA changes something on its end forcing a required update to speech addons. 

Josh