If you are getting good pay and you have no stock options then I would recommend riding the ship down (although in this metaphor you seemingly have multiple lives). If it is no secret, then there is nothing you can do, really.

I don't think you have any liability here, though you are playing in a grey area without outright telling them (at least in an email) that you are worried about the state of the program. If they ignore you, then it is on record for the future.