2464010
I just checked there, and it seems to have been updated as recently as September 2018, but again, multiple chapters that aren't here.

66064
436520
You might already know this, but there's a little more at the Spacebattles forums. Unfortunately, it seems that additional updates beyond these might be a very long while coming.
https://forums.spacebattles.com/posts/12403296/
https://forums.spacebattles.com/posts/12463033/

sadly, this seems dead.

Will another chapter of Mare Genius be coming soon? We really miss it at our house.