iphoto 2011 problem

[help_needed]

I got the new imac yesterday and i did the migration assistant to transfer all the information from my old imac (2007/2008) model to my new one.
Anyway i was using iphoto and i have 2008 model of it on my new computer.

I don't understand where the 2011 version has gone. imovie and garage band are both the 2011 version.
How can i restore the 2011 version of iphoto?

can anybody help? thanks