InDesign "edit with" iPhoto now jumps to Preview

This may be an InDesign (CS5.5) question but I can't find anything on the Adobe forums. I imported photos from iPhoto into InDesign. To modify an image, I clicked on the Edit icon under Links and it opened the image in iPhoto as I wanted. Now all of a sudden it goes to Preview. iPhoto isn't even an option on the Links palette menu in InDesign. I can choose it (under Other) for one photo but not for all, and then it imports the image into iPhoto rather than locating the file in iPhoto. This started happening after I changed some file names in iPhoto. I tried relinking some of the images but InDesign still jumps to Preview when clicking on the pencil icon in the Links palette. Thanks for any light you can shed.