Home and waypoint questions

Hi everyone.
I have two questions:
1.
I have a mission containing several waypoints(let say 10), but time to time I want my rover to go only to one point(e.g. 5) Is it possible to execute such an action from Tower?
2
Is is possible to change home location when GPS position is already locked?
I can see home icon can be freely moved, but how to upload it to APM?
Im using Tower with Rover (APM 2.6)…

Andrew