iphoto library upgrader disaster
About to upgrade to Yosemite from system 10.9.5 but first ran into iPhoto problem. A few days ago, I restarted my computer and went to open iPhoto (v9.5.1). Rather than open, I got a window that said that I had to upgrade my iphoto library in order for iPhoto to open. Seemed odd since I hadn't updated software so I restarted my computer and the same thing happened. I did it again and got the same results.
I followed the prompts to download and run iPhoto Library Upgrader. When it finished, I had a disaster. My libraries are totally destroyed. They open and show events but there are no thumbnails and no photos in the events or in the photo menu. There are blank boxes where thumbnails used to be and the individual images are black boxes that when clicked, bring up the caution triangle with an exclamation point in the center that indicates that iPhoto can't find the image.
I went into time machine, back a few days before the message to upgrade appeared and tried to open iPhoto but that did nothing.
Now, I don't know what to do. I have a backup but do I reinstall iPhoto from the backup or do I reinstall the libraries from the backup or????
Mac OS X (10.7.2), iCal