The red screen that you are seeing more often than not is a result of outdated video drivers on your machine that do not support the openGL features that are used in Alice 3.1. There is information on how to update your drivers at
http://help.alice.org
Later today there should be an updated release of Alice 3.1 that should also help with this (it will be either Alice 3.1.44.0.0 or later).