⭐ Chevereto Godlike
Our goal at this point is that everybody try the beta in their own dev setups and I can't recommend to upgrade production systems to V4 at this time.Can i upgrade my exist site to the V4 ? Also is there some screens from the new UI ?
Current V4.0 release status is under beta development preview and we expect to get it ready for production later this year or early as January 2022. Ideally, you will try V4 under Docker and perhaps later this month you could to try it elsewhere (I can't guarantee that at this time as I've to release V3.20.13 in between). I must insist in that V3.20 is still the production standard.
Regarding the user interface, that upgrade came in V3.20 and the UI in V4.0 beta looks exactly the same as V3.20 (except for the new error handling system). Check here and here for screens.