I bought Minecraft Windows 10 edition in the Microsoft store a few weeks ago. I didn't know then that my friends all have Java edition. I have no desire to spend another 30 euro and am looking for a way, since I have already bought the java edition.
You will then have to buy the Java Edition. It's the other way around. Your friends can get the Win10 Edition for free. You can demand that. (You still have the Java)
This will soon no longer be possible. The codes will expire soon.
And not even if the friends bought it too late
Can be ^^ I'm a Win10 Edition player. Without Java