Although it's not entirely untrue though that a name could sell copies, can anyone honestly think of a name so awesome that it was the sole determining factor, or even a significant factor, in you buying it? Was "Starfarer" actually so great that you wouldn't have bought it if it was originally named "Starsector?"
The important thing is that you don't have a stupid name. For example, if your name was something ridiculous like, iunno, "Space Pirates and Zombies," then there might be some people who shun your game and you might lose a few sales. But Starsector won't cost the game anything. Because it isn't weird. It is to us, but not to new customers. They won't give half a darn.
Starfarer wasn't really all THAT unique anyway.