When I download the launcher for the Java version from the minecraft.net page, I get the old Minecraft launcher but not the brand new one. Why is that?
And how can I get the nine launcher?
Those were the days with the old launcher.
You get the old launcher. But it should update itself to the latest version the first time it is started.
Do you know the Zelda Adventure Mod?
No, nothing has happened that way for a long time
See if you have the compatibility mode.
Naturally
Do you have windows 10?
Yes
How do i do this and how can i change it?
Right click on the minecraft launcher icon, go to properties, then to compatibility and then there's a tick "run program in compatibility mode for: (operating system name)