There is no download page for Zidoo NEO Alpha but I guess the former beta firmware v6.7.42 has also changed to stable.
Android 9
Zidoo NEO S stable firmware v6.7.42
Former beta firmware v6.7.42 for model Zidoo NEO S has been released as stable on the download page.
Zidoo NEO X stable firmware v6.7.42
Former beta firmware v6.7.42 for model Zidoo NEO X has been released as stable on the download page.
Zidoo UHD3000 stable firmware v6.4.42(_G)
Former beta firmware v6.4.42(_G) for model Zidoo UHD3000 has been released as stable on the download page.
Zidoo Z1000 Pro stable firmware v6.4.42(_G)
Former beta firmware v6.4.42(_G) for model Zidoo Z1000 Pro has been released as stable on the download page.
Zidoo Z10 Pro stable firmware v6.4.42(_G)
Former beta firmware v6.4.42(_G) for model Zidoo Z10 Pro has been released as stable on the download page.
Zidoo Z9X stable firmware v6.4.42(_G)
Former beta firmware v6.4.42(_G) for model Zidoo has been released as stable on the download page.
Zidoo DayDream v1.1.6 (RTD1619)
A test version of Zidoo DayDream (Screensaver) has been released on the Zidoo forum.