Tom H. said: Gold said: this sounds like something i've heard about, a weird situation but see if this applies to you? it's not an Update, it's an ADD-ON that ruins the monster placement. If you've bought the Bundle of mad mage, you have both: The Module (which is populated with monsters), and the Add-On Version which is more like a blank mega-dungeon you can add the levels to other games you may have. If you add the Add-On, on top of the Module, it ruins it in the way you described, erases all the monsters. This happened to my DM, we had to reinstall Mad Mage on a fresh new tabletop and bring the PC's character sheets over to the newer one. I did the same thing. There should be a warning or something if that is intended behavior. Fortunately I only modified and adjusted level one before that happened to me. The marketplace page tells you that you already have that content if you have the module. Note: This product only contains the maps and decks from Waterdeep: Dungeon of the Mad Mage ,
and does not include tokens, book contents, notes, art handouts, or any
other element. All of the contents of the Map & Card Deck Addon are
available in the complete Waterdeep: Dungeon of the Mad Mage bundle. It also warns you what will happen if you activate the addon on top of the module. Important Notice:
The Waterdeep: Dungeon of the Mad Mage - Map & Card Deck
Addon is not designed to be added into the core Dungeon of the Mad Mage
adventure module, as these elements already exist within the module.
Attempting to import them into the core module will result in your
current maps being overwritten by the addon's maps.