iirc keo's trying to find inspiration for the following days of the route, as they feel that the more time they wait to write the continuation of the route, the better it'll be. so it's definitely going to be coming out eventually. just nobody knows when that'll be. as for how to access his route...
here! (copypasted from rickalick)
1. Get a coat on day 1(either talk to Rune before losing the key, or ask Devon for help when you lost it)
2. Do the Klaus event when given chance on the first day. Make sure you talk to him and follow him all the way into the woods.
3. After that follow...
3.a) the Bjorn route, in which case just wait till you get a chance to chase after Klaus into the woods again.
3.b) the Devon route, in which case don't help him with telescopes and talk to Klaus in the cafeteria