I accidentally deleted save files, put them back, but can't load game

If you're missing any families and you have more than one save, check Manage Households, it's up in the right corner of the map screen.

In the My Households tab (which is automatically selected) you should be able to find what families are in-game and what world they are in.

Please note, If Save is continually used, the game progress gained or family played may be lost. This is why it's important to use Save As, give the save a new name, save often and back the files up in case they maybe needed later.