You can fix this yourself I think, if you have the editor and a few minutes to spare.
First you need a trigger. Go to the "Module" menu and select "Trigger editor". If you want to deploy on the first turn, you make a task with the condition "Game - Mission started" and the action "Game - Start deploy round at next turn". Very simple.
You also have to make sure there are deploy zones available (in the objects palette in the editor there's an icon with a green arrow and a yellow square.)
If you are editing one of the multiplayer maps that came with the game, you might want to remove all units already placed on the map. Go to the "Map" menu, select "units" and click "Delete all".