Redo his route. When I added his bottom scene there was a new variables check added that's probably incompatible with those saves you have. If that doesn't help, join discord so we can talk there.
Viewing post in Shelter (Furry Visual Novel) comments
Hey could you help me. I did the story from the beging did the scene on the roof early morning then went to his class didn't keep traning did the jerk off while think about somebody here for the once a bad boy I invited Alon and I kicked Rune in the snout and killed the monster myself even when I don't kick Rune in the snout the bottom doesn't get unlocked unless it does at the end of the playthrough.