Please help! I was looking for a file in Finder and came upon seemingly-strange files (I'm not a computer expert at all) so I followed them back to their folder not realizing that it was part of iPhoto, and deleted them, thinking they were some kind of extraneous material. Then I realized they were part of iPhoto, went and removed them from Trash. But I can't find a way to make the iPhoto database work in iPhoto. When I open iPhoto it is completely empty! I just got back from a long trip and I had all my photos there, edited and organized...please help! What do I do? When I open iPhoto it prompts me which iPhoto library I want to use, and then it doesn't open anything but instead prompts me again telling me I need to upgrade iPhoto. I decided not to touch anything yet and ask for help. Thank you in advance!