LadyCFII's note: This suggestion will work only with the Windows version. Mac users should see Arthur's post for details about updating their game. Badger55, have you re-downloaded the "trial version" and then installed it again? It will install over your game, but it will still be the full version that you paid for. Then, when you go into the game, go to the Menu and look at the bottom left to see what version it is after you have done that. The last two numbers should now be .04 -- unless they have released another version since I got the last one anyway.
Once you have .04 installed, it should help. I know everyone else is saying that you don't have to delete your existing families and start new ones, but even though it did help my existing families I found that after I deleted all my previous ones and started new ones that there was a tremendous difference in their energy levels.
I've also discovered something else. I am the only person who uses my computer, but I still have a second log in anyway. What I have now done is I installed the game under the second log in and now I have 5 families that I can play during the day when I have the time and then I have 5 more I can play later in the evening and into the early morning if I can't sleep. By doing that, the families that need to sleep during the night are being left alone and the ones that need to sleep during the day are also being left alone. It's working out really well.