I downloaded the Sims 3(regular one) a while back on my laptop, & just last week I downloaded Sims 3 Late Night on it too . I had to give back Late Night to my friend & now I am trying to play JUST The Sims 3. I click on the short cut to JUST the Sims 3, but when it pops up it is The Sims 3 Late Night pop-up, & when I hit play it tells me I must put in Sims 3 Late Night Disk. WHAT DO I DO?!?!