Hi,
I am currently using both the latest versions of Dialog and Stencyl. Out of nowhere, in the middle of a session, Dialog became disabled. (It worked the previous time I tested the scene, but by the next time I hit "test scene", Dialog had somehow been disabled.) I had to go back into the Extensions Manager and enable Dialog again. After doing so, all my dialog chunks were gone. I had to revert to an earlier version of my game (fortunately, I save between 3 and 5 versions of the game each day, so I didn't lose very much at all.)
