At the free level, it's going to be a little tedious. You need to start by creating a second game from the same module. That will give you a complete copy of the module to pull data from. Next, for each of the things you accidentally deleted you create a character in the new copy, then set the image as the default token on it. Then move those characters into your character vault, and export them to the old game where the content is missing. Drag each character out onto the map where the content is missing and position it where it needs to go. Delete all the characters you used for copying the content across. At the pro level (and it might be worth the 10 bucks to jump up to it for a month depending on how extensive the damage is), you can use the Transmogrifier to copy whole pages from other games, so you would: delete all the broken pages from the old game create a new game from the module, copy the previously broken pages from the new game into the old game.
