Iphoto won't open
I have been using iphoto since I got this computer a few years ago but lately when I try to download a pic from someone's iphone, my iphoto shows it needs to be upgraded to work with this version of iPhoto. It indicates that previous versions of iphoto will not be readable after the upgrade. I always press Quit & do not accept the upgrade & in the past my iphoto has opened as usual. Today this notice came up when I tried to open iphoto & after I clicked Quit, the iphoto will not open at all. It will not open when I connect my camera to download new photos either.
I have a backup for my info so hope my pics are somewhere.....Any ideas how to open iphoto?
Thanks
iMac, Mac OS X (10.6.8)