OP:
What version of the OS are you using now?
Do you have iPhoto up-and-running now?
The final version of iPhoto is 9.6.1.
The way to get it is:
1. delete your existing copy of iPhoto from the applications folder (put a backup copy somewhere else)
2. go to the App Store, click on "purchased items", iPhoto should be there (even though previous version may have been free)
3. download it (again). You should receive version 9.6.1.
Having said that, there are -other ways- to get 9.6.1, although the sources may be "non-approved". It -can- be found, if you look for it...