Depends on the random appearance of genius. I think our sun's concern is more cooling down than exploding, something like 4 or 5 billion years. The most likely scenario would be that the loss of mass due to the change in the sun would cause it's gravitational field to at least partly lose it's grip on at least the outer planets. If we were going to stay here, it would have to be a MASSIVE chore, probably on the scale of a Dyson sphere or something, coupled with some sort of inertia manipulation. I would guess something like the precursor to Firefly would be more likely (GTFO, to say the least, find someplace else to RAPE), though it is difficult trying to figure between faster than light travel/terraforming and massive pieces of planet sized construction which is more realistic. All depends on some random future number cruncher going EUREKA, and what that eureka entails.