How do I reset Iphoto application to how it was when I first bought my computer? I didn't understand how to use iphoto, so I started to save my pictures in folders through iphoto. Then I thought I had saved double copies of my pictures (one in iphoto folder and one on my personally made folder), so I went into the iphoto folder manually and tried to delete the pictures displayed on iphoto. And now I have pictures that show up on iphoto but when i click on it, nothing comes up because I have deleted the actual photos in folder. Any way to reset iphoto so that I can start all over again?