Hi, now at level 18 today.
A fish ground was exhausted. So I pulled down the fishermans hut.
I had 10 building licenses left, after pulling down the hut it became 11. So far so good.
But after building a new fishermans hut, the building licenses went from 11 to 9 ....
Another small bug, perhaps?
A problem earlier mentioned: if you pull down an exhausted stone quarry, you even don't get the lincense back. I don't know if this bug is fixed already?