How to enter minecraft betas on windows 10?

didn't work, but thank you anyway.

Log out of your console companion app and log in through the insider app.

Hi Adrian,

That's is pretty much the official way of leaving the beta per Mojang's article, "How to Join (and leave) the Minecraft
Beta".

If that doesn't work for you then I found another way of removing all Minecraft services from all users on your PC using PowerShell. This should hopefully re-install the live version of Minecraft Windows 10 edition:

To remove the beta version of Minecraft from all registered users on the PC:

1. On the PC, press Windows Key + X.
2. Select Command Prompt (Admin).
3. In the Administrator: Command Prompt window, type: powershell
   
4. Press Enter.
5. In the Administrator: Command Prompt window, type or copy & paste: Get-AppxPackage -allusers *minecraftUWP* | remove-appxpackage -allusers
6. Press Enter.
7. You can now close the Command Prompt window.

After entering the commands and closing the window, you will need to uninstall/reinstall Minecraft to complete the removal of the beta version. If this does not work, then there has to be another user/account on your PC that is still enrolled
in the beta that is flagging the PC to continuously download the beta.

I bought a bedblock edition of minecraft from windows 10 mobile(1.9.0) but I want to play the beta version(1.11),and I don't know how to do it(or maybe I can't get the beta version of minecraft windows 10 mobile,just like the ios version?)

Hey there, SnappyBark0! Minecraft: Windows 10 Edition Beta is only available free for users that had the original Minecraft: PC (or Mac) Edition. If you only have the Minecraft: 360 Edition, you will not be able to get the Windows 10 Beta version for free.

For more information, check out our
Minecraft: Windows 10 Edition Beta FAQ! Please let us know if you have any further questions.