It’s not on the Prime Go+ yet, I checked about 20 minutes ago. Not that I’m bothered about stems anyway, just nosey 
Looks like this is just Engine desktop, not the players.
Yo la he recibido pero aun no la he actualizado porque estoy transfiriendo música, pero no he visto nada en el hilo principal🤔
not on my prime 4 + also, plus i check on the offical site i didnt c noting base on the new update 4.2.1
me also i didnt update it yet
I’ve already updated, but the website doesn’t inform what has changed.
I have seen it too. No info on the official site yet. I made a backup and installed it …
Might be for enabling STEMS on other hardware since tomorrow is December 11th 
Updated the app nothing available on my players yet, Bug fix or more for stems
It’s just available for desktop for the time.
Most likely a fix for this:
Also got this update yesterday. Anybody knows how to get the license for stems on other devices?
Yes, sit patiently and you’ll be able to pay £9.99 for it at some point in the next couple of days.
Updated my desktop app, no update for the controller OS as yet. Patiently waiting to be able to pay for stems, no option online to buy the license as yet…
Same here. Controller is updated to 4.2. Desktop software at 4.2.1. But no link anywhere to be seen on the website for buying the bloody licence. Nothing under https://enginedj.com/account and even nothing under Customer Login.
Still looking where i can buy the licence. Its almost 4 PM here on November 11th, very unclear and confusing marketing and communication thus far.
Apparently stems will be released at 3pm Eastern time today. So about 5 hours from now.
8PM in the UK? I’ll get on with something else then. 
Thanks for the heads-up. Bit of a shame that its close to bedtime for a lot of users in the UK, Europe, Asia, Afrika etc.