What happen to MetaEditor 4?

I’v had MetaTrader 4 installed, I haven’t used it for a long time, and now I notice that it has MetaEditor 5.
Uninstall it, download again, and its the same, and now it seem like MetaEditor 4 has been vanish.

what happened?

If now I must work with MetaEditor 5, can I create EA with it and use it in MetaTrader 4?

did you chose MetaTrader 4 in your broker account

Its a demo account.
I forgot to mention, I apologize.