My interest is in Desktop Linux version, wich seems to completely frozen, no bug fixes, no solution since more than 2, 4 months. Looks dead.
I tried to get early acces manually. Perhaps it should offered to customers automatically, especially the have reported seriuos problems.
As professional licenced (paying) user I prefer much better bug fixing and receiving solution to the pulse audio problems, I reported moths ago: (in January 2016, without a satisfied solution provided)
Refer to [zoiper #157491] Several Problems on just purchased Zoiper
It does not like a behavior to answer questions from paying cutomers.