Click and hold the mouse button down to direct your character, and you should be able to find your way to the observatory waypoint (straight north east of where you start in the homestead) and then the exit waypoint (again, straight north east). If the map / mini-map are ok, that should give you an idea of where to go.
Can you see the waypoints? A couple other people have run into this problem at the homestead, but were able to get out, so you should at least get a highlight of the waypoint when you mouse over one.
Please email supportdos@larian.com, with a description of the problem and the report.zip file generated by the D:OS support tool, for both systems.
