I want to get Minecraft for Windows 10, I want my own. Not 28 euro for spending. Is it true if you bought the Java Edition before 2018 that you then get the version for free?
You just have to download the launcher from minecraft.net and then connect to your account.
No
then you have to save
If you still have your account with the license, all you have to do is log into Mojang
Yes, if I do that I can play the demo
I just want to test it briefly because of ray tracing
There are alts for that
Take this: https://www.minetest.net/downloads/
No, since April there has been no Windows 10 Edition in addition to the Java Edition. Keys not redeemed by then have been deleted.
However, you can buy a Windows 10 Edition key cheaper in a key store.