Households have vanished

Started playing a new household i created as i lost all of my previously saved households and i was gutted as i didn't think I'd be able to get them back so i started fresh... Sorted most of my files out for my game. Put the .blueprint, .tray etc. all in my ' tray ' folder, the saves files in my ' saves ' folder etc. went to play on my sims, the new household has vanished and my old households had all returned. I'm so confused, i don't know what i have done wrong, i don't know what's gone wrong. I've deleted duplicates from my mods etc. Please someone help.😭😫

Thanks

Beth