Sorry, probably a new user question. So, I was just trying out dm tools on the first trial game and I had uncovered a portion of the rat room. That worked fine as I switched back and forth from player to GM. I was testing to make sure that what I was doing was coming across correctly for the players. I hit the "reset" fog of war button and the shaded area came back, but then when I tried to uncover sections of the area again it showed the selected area as uncovering in GM mode, but when I went back to "join as player" it still showed everything blacked out. A buddy joined to test it also with the same results. Did I do something wrong, or is there something else I have to do to make it work again?
