According to our research of Washington and other state lists there were 3 registered sex offenders living in Oakville, Washington as of October 07, 2015. The ratio of number of residents in Oakville to the number of sex offenders is 225 to 1.
I thought so as well but accusing to the website https://mojang.com/2015/07/announcing-minecraft-windows-10-edition-beta/ things are changing. I very much doubt they will stop working on the java version since it supports multiplatforms aka making them more money.
After that, save, run Minecraft once and quit the launcher. Get the latest version of forge for your Minecraft version and run the installer. The reason why it needs you to run Minecraft 1.7.2 is because it is adding classes to the 1.7.2.jar file and installing patches.