@MojangSupport According to your article called "Minecraft for Windows 10," Players who have purchased Minecraft: Java Edition before October 19th, 2018 can get Minecraft for Windows 10 for free by visiting their Mojang account. I've had Java Edition since 2012 and cannot redeem?
Please send us an email at https://help.minecraft.net/hc/en-us/requests/new … and we will assist. Remember to attach your Transaction ID. ^JR