Not sure if this is the appropriate place, however here it is. I know I'm not the only one to have this problem. Minecraft reverts option settings back to default. It was brought to my attention by deadly that this happens when going onto classic. However, I have found a fix to the issue. In %APPDATA% in the .minecraft folder, there will be a text file named options.txt. Right click on this and then go to properties. Once in properties simply click on READ ONLY. Click apply and then okay. Problem solved. Enjoy and you're welcome...