Going from v4-1/70 to v4-1/100 will fix a few bugs and allow reading of dual-layer DVDs

BMW don't always tell us what the bugs are :-)

I cannot remember if 3D Perspective view is already available in 4-1/70, but if not, then 4-1/100 will bring that new feature to you.

Regarding your question of whether the route is cleared when cancelling it, I am not sure. That may be the way it was designed to work.