New update!
This one is mainly a bugfix update - the Star Beacon's reactions are more reliable, some materials have been moved from the inorganic file so they shouldn't show up in preferences, etc.
As for features: Toads have a new building, the Toad House. It gives them more control over powerup storage - you can now choose which plants to seal off. There are more powerups too: the Metal Mushroom and the Golden Mushroom. One makes you as hard as iron, the other doubles your speed. The 1up Mushroom has been changed as well: eating it will give you the ability to revive one corpse. Leave the coffin of a beloved citizen outside the dining room and bring them back to life with full health!
Enemies drop special yellow coins now. While not too valuable on their own (each coin has a base value of 1), 100 of them can be traded in for a Power Star at the Star Beacon. Request missions now give yellow coins instead of star pieces, so they can be added to your stockpile of coins obtained from enemies.
Koopas have a new potion: The Potion of Brute Strength. Whoever drinks it will double in size, have all of their physical stats doubled, and be rendered immune to most status effects, and unlike the Super Mushroom, it doesn't wear off. But there's a catch, of course... while having one Brute is fine, two or more occupying the same area of your fortress are prone to lashing out at each other or flying into a berserk rage (the probability is lower if there are non-Brutes around, but it can still happen). So an army of Brutes is right out. You might want to give it to your landholder to make sure they don't die so easily (remember, Koopas require a living landholder to build an army), although it's worth noting that the Brute potion also removes their sense of fear... and since landholders are also responsible for laying down justice, it doesn't leave much hope for criminals who get the hammer. Which is, of course, perfectly Koopa.
You can now find ? blocks, both underground and flying around above ground. All three races can open them up at their respective Crafts workshop. They often contain powerups, powerful weapons, coins, or several of the above.